[DOCS] Adjust removal version of switchable controller actions

Switchable controller actions are removed with TYPO3 12.0. The deprecation
note is adjusted to reflect it.

Resolves: #97523
Related: #89463
Related: #96282
Releases: main, 11.5, 10.4
Change-Id: Iad04bbb573f2b87ce87a8faabe25c97a8812f937
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74464


Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>

typo3/sysext/core/Documentation/Changelog/10.3/Deprecation-89463-SwitchableControllerActions.rst

@@ -9,8 +9,8 @@ See :issue:`89463`
 Description
 ===========
 
-Switchable controller actions have been marked as deprecated and will be removed in one of the next major versions
-of TYPO3, probably version 11.0 or 12.0.
+Switchable controller actions have been marked as deprecated and will be removed
+in TYPO3 version 12.0.
 
 Switchable controller actions are used to override the allowed set of controllers and actions via TypoScript or plugin
 flexforms. While this is convenient for reusing the same plugin for a lot of different use cases, it's also very