[BUGFIX] Use internal links for Upgrade chapters (#4919)

releases: main, 13.4, 12.4

Author: linawolf

Documentation/ApiOverview/Database/DatabaseUpgrade/Index.rst

@@ -48,8 +48,8 @@ installation.
 ..  include:: /Images/AutomaticScreenshots/AdminTools/DatabaseAnalyzer.rst.txt
 
 ..  seealso::
-    For more information about the process of upgrading TYPO3, see the
-    :ref:`Upgrade Guide <t3install:start>`.
+    For more information about the process of upgrading TYPO3, see chapter
+    :ref:`Upgrades <upgrading>`.
 
 
 ..  index::

Documentation/ExtensionArchitecture/FileStructure/ComposerJson.rst

@@ -57,7 +57,7 @@ reasons:
 #.  Working with Composer in general is strongly recommended for TYPO3.
 
     If you are not using Composer for your projects yet, see
-    :ref:`t3install:migratetocomposer` in the "Upgrade Guide".
+    :ref:`migratetocomposer` in the "Upgrade Guide".
 
 
 ..  _ext-composer-json-minimal:

Documentation/ExtensionArchitecture/HowTo/UpdateExtensions/UpdateWizards/Creation.rst

@@ -273,6 +273,5 @@ It is also possible to execute the wizard from the command line:
                 typo3/sysext/core/bin/typo3 '\\MyVendor\\MyExtension\\Upgrade\\ExampleUpgradeWizard'
 
 ..  seealso::
-    You can find more information about running upgrade wizards in the
-    :ref:`Upgrade wizard section <t3install:use-the-upgrade-wizard>` of the
-    Installation Guide.
+    You can find more information about running upgrade wizards in the section
+    :ref:`Upgrade wizards <use-the-upgrade-wizard>`.

Documentation/Security/GeneralGuidelines/Index.rst

@@ -142,7 +142,7 @@ version 11.x.x), a minor update (e.g. from version 11.4.x to version
 11.5.11 to 11.5.12).
 
 In most cases, a maintenance/bugfix/security update is a no-brainer,
-see :ref:`TYPO3 Installation and Upgrade Guide <t3install:start>`
+see chapter ::ref:`Patch/Bugfix updates <t3coreapi:minor>`
 for further details.
 
 When you extract the archive file of new TYPO3 sources into the

Documentation/Security/GuidelinesAdministrators/FileDirectoryPermissions.rst

@@ -13,8 +13,8 @@ prerequisite for a secure web application. Well-considered access
 permissions on files and directories are an important part of this
 strategy. However, too strict permissions may stop TYPO3 from working
 properly and/or restrict integrators or editors from using all
-features of the CMS. The official
-:ref:`TYPO3 Installation and Upgrade Guide <t3install:start>`
+features of the CMS. The section
+:ref:`TYPO3 administration <t3coreapi:administration>`
 provides further information about the install procedure.
 
 We do not need to mention that only privileged system users should