Update Rector rule reference for migration instructions (#6369)

Releases: main, 13.4

Co-authored-by: Simon Schaufelberger <simonschaufi@users.noreply.github.com>

Author: github-actions[bot]

Documentation/ApiOverview/Icon/Index.rst

@@ -275,7 +275,7 @@ To search for available icons, you can browse through
 Migration
 =========
 
-The Rector v1 rule `\Ssch\TYPO3Rector\Rector\v11\v4\RegisterIconToIconFileRector`_
+The Rector rule `\Ssch\TYPO3Rector\TYPO311\v4\RegisterIconToIconFileRector`_
 can be used for automatic migration.
 
 For manual migration remove all calls
@@ -284,4 +284,4 @@ your :file:`EXT:my_extension/ext_localconf.php` and move the content to
 :file:`Configuration/Icons.php` instead.
 
 
-..  _\Ssch\TYPO3Rector\Rector\v11\v4\RegisterIconToIconFileRector: https://github.com/sabbelasichon/typo3-rector/blob/1.x/docs/all_rectors_overview.md#registericontoiconfilerector
+..  _\Ssch\TYPO3Rector\TYPO311\v4\RegisterIconToIconFileRector: https://github.com/sabbelasichon/typo3-rector/blob/main/docs/all_rectors_overview.md#registericontoiconfilerector