Fix image URLs after nord-docs GitHub flow and main branch migration

The URLs to image assets were broken due the recent GitHub flow
migration [1] in the `nord-docs` repository as well as the switch from
the `master` to `main` branch [2].

[1]: nordtheme/web#229
[2]: nordtheme/web#236

Relates to nordtheme/web#229
Relates to nordtheme/web#236
GH-12

Author: svengreb

CHANGELOG.md

@@ -1,4 +1,4 @@
-<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/repository-hero.svg?sanitize=true"/></a></p>
+<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/repository-hero.svg?sanitize=true"/></a></p>
 
 <p align="center"><a href="https://github.com/arcticicestudio/nord-xcode/releases/latest"><img src="https://img.shields.io/github/release/arcticicestudio/nord-xcode.svg?style=flat-square&label=Release&logo=github&logoColor=eceff4&colorA=4c566a&colorB=88c0d0"/></a> <a href="https://www.nordtheme.com/docs/ports/xcode"><img src="https://img.shields.io/github/release/arcticicestudio/nord-xcode.svg?style=flat-square&label=Docs&colorA=4c566a&colorB=88c0d0&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiI%2BCiAgICA8cGF0aCBmaWxsPSIjZDhkZWU5IiBkPSJNMTMuNzQ2IDIuODEzYS42Ny42NyAwIDAgMC0uNTU5LS4xMzNMOCAzLjg0OGwtNS4xODgtMS4xOGEuNjY5LjY2OSAwIDAgMC0uNTcuMTMzLjY3Ny42NzcgMCAwIDAtLjI0Mi41MzF2OC4xMzNjLS4wMDguMzIuMjEuNTk4LjUyLjY2OGw1LjMzMiAxLjE5OWguMjk2bDUuMzMyLTEuMmEuNjY4LjY2OCAwIDAgMCAuNTItLjY2N1YzLjMzMmEuNjU5LjY1OSAwIDAgMC0uMjU0LS41MnpNMy4zMzIgNC4xNjhsNCAuODk4djYuNzY2bC00LS44OTh6bTkuMzM2IDYuNzY2bC00IC44OThWNS4wNjZsNC0uODk4em0wIDAiLz4KPC9zdmc%2BCg%3D%3D"/></a></p>
 
@@ -33,10 +33,10 @@ Please see the [corresponding issue in the Nord Docs repository][gh-nord-docs#18
 See [Nord's official documentation to learn how to use the color set][nord-docs-ports-xcode-asset_catalog].
 
 <p align="center">Asset Catalog Color Set</p>
-<p align="center"><a href="https://www.nordtheme.com/docs/ports/xcode/asset_catalog" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/ui-asset_catalog.png" alt="Preview: Nord Xcode Asset Catalog Color Set"/></a></p>
+<p align="center"><a href="https://www.nordtheme.com/docs/ports/xcode/asset_catalog" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/ui-asset_catalog.png" alt="Preview: Nord Xcode Asset Catalog Color Set"/></a></p>
 
 <p align="center">Xcode Interface Builder with Nord</p>
-<p align="center"><a href="https://www.nordtheme.com/docs/ports/xcode/asset_catalog" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/ui-interface_builder.png" alt="Preview: Nord Xcode Interface Builder with Nord"/></a></p>
+<p align="center"><a href="https://www.nordtheme.com/docs/ports/xcode/asset_catalog" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/ui-interface_builder.png" alt="Preview: Nord Xcode Interface Builder with Nord"/></a></p>
 
 ## Improvements
 

README.md

@@ -1,4 +1,4 @@
-<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/repository-hero.svg?sanitize=true"/></a></p>
+<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/repository-hero.svg?sanitize=true"/></a></p>
 
 <p align="center"><a href="https://github.com/arcticicestudio/nord-xcode/releases/latest"><img src="https://img.shields.io/github/release/arcticicestudio/nord-xcode.svg?style=flat-square&label=Release&logo=github&logoColor=eceff4&colorA=4c566a&colorB=88c0d0"/></a> <a href="https://www.nordtheme.com/docs/ports/xcode"><img src="https://img.shields.io/github/release/arcticicestudio/nord-xcode.svg?style=flat-square&label=Docs&colorA=4c566a&colorB=88c0d0&logo=data%3Aimage%2Fsvg%2Bxml%3Bbase64%2CPHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNiIgaGVpZ2h0PSIxNiI%2BCiAgICA8cGF0aCBmaWxsPSIjZDhkZWU5IiBkPSJNMTMuNzQ2IDIuODEzYS42Ny42NyAwIDAgMC0uNTU5LS4xMzNMOCAzLjg0OGwtNS4xODgtMS4xOGEuNjY5LjY2OSAwIDAgMC0uNTcuMTMzLjY3Ny42NzcgMCAwIDAtLjI0Mi41MzF2OC4xMzNjLS4wMDguMzIuMjEuNTk4LjUyLjY2OGw1LjMzMiAxLjE5OWguMjk2bDUuMzMyLTEuMmEuNjY4LjY2OCAwIDAgMCAuNTItLjY2N1YzLjMzMmEuNjU5LjY1OSAwIDAgMC0uMjU0LS41MnpNMy4zMzIgNC4xNjhsNCAuODk4djYuNzY2bC00LS44OTh6bTkuMzM2IDYuNzY2bC00IC44OThWNS4wNjZsNC0uODk4em0wIDAiLz4KPC9zdmc%2BCg%3D%3D"/></a> <a href="https://github.com/arcticicestudio/nord-xcode/blob/develop/CHANGELOG.md#050"><img src="https://img.shields.io/github/release/arcticicestudio/nord-xcode.svg?style=flat-square&label=Changelog&logo=github&logoColor=eceff4&colorA=4c566a&colorB=88c0d0"/></a></p>
 
@@ -10,7 +10,7 @@
 
 <p align="center">Designed for a fluent and clear workflow based on the <a href="https://www.nordtheme.com" target="_blank">Nord</a> color palette.</p>
 
-<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/overview.png"/></a></p>
+<p align="center"><a href="https://www.nordtheme.com/ports/xcode" target="_blank"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/overview.png"/></a></p>
 
 ## Getting started
 
@@ -44,21 +44,21 @@ To activate and use Nord Xcode as your default color theme…
 2. …switch to the _Fonts & Colors_ tab
 3. …select _Nord_ from the list
 
-<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/ui-activation.png"/></p>
+<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/ui-activation.png"/></p>
 
 ## Features
 
 <p align="center"><strong>Beautiful code to keep focused.</strong></p>
 <p align="center">The color scheme supports all syntax types available in Xcode.</p>
-<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/editor-syntax_types.png"/></p>
+<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/editor-syntax_types.png"/></p>
 
 <p align="center"><strong>Nord as color set.</strong></p>
 <p align="center">All Nord colors right at your hand — Use the <a href="https://developer.apple.com/library/archive/documentation/Xcode/Reference/xcode_ref-Asset_Catalog_Format" target="_blank">asset catalog</a> color set in the <a href="https://developer.apple.com/xcode/interface-builder" target="_blank">Interface Builder</a> and programmatically.</p>
-<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/ui-asset_catalog.png"/></p>
+<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/ui-asset_catalog.png"/></p>
 
 <p align="center"><strong>Build beautiful UI elements with Nord.</strong></p>
 <p align="center">Create UI elements in the Xcode <a href="https://developer.apple.com/xcode/interface-builder" target="_blank">Interface Builder</a> using Nord colors.</p>
-<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/ports/xcode/ui-interface_builder.png"/></p>
+<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/ports/xcode/ui-interface_builder.png"/></p>
 
 ## Contributing
 
@@ -70,7 +70,7 @@ Please take a moment to read Nord's full [contributing guide][nord-contrib-guide
 
 The guide also includes information about [minimal, complete, and verifiable examples][nord-contrib-guide-mcve] and other ways to contribute to the project like [improving existing issues][nord-contrib-guide-impr-issues] and [giving feedback on issues and pull requests][nord-contrib-guide-feedback].
 
-<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/develop/assets/images/nord/repository-footer-separator.svg?sanitize=true" /></p>
+<p align="center"><img src="https://raw.githubusercontent.com/arcticicestudio/nord-docs/main/assets/images/nord/repository-footer-separator.svg?sanitize=true" /></p>
 
 <p align="center">Copyright &copy; 2017-present <a href="https://www.arcticicestudio.com" target="_blank">Arctic Ice Studio</a> and <a href="https://www.svengreb.de" target="_blank">Sven Greb</a></p>