Update README.md

Author: electrikmilk

README.md

@@ -57,6 +57,8 @@ const preview = new ShortcutPreview({
 });
 ```
 
+[Learn more about usage on the project wiki.](https://github.com/electrikmilk/preview-shortcut/wiki)
+
 #### Dark Mode Support
 
 ![Screenshot 2023-11-25 at 19 51 04](https://github.com/electrikmilk/preview-shortcut/assets/4368524/9cac0dc7-945c-4ada-804e-5c3e447f0fc3)