[TASK] Add better PHPStan annotation for method getRepositoryClassName

Resolves: #103170
Releases: main, 12.4, 11.5
Change-Id: Ic7f63f6c55b832af27e9e30a0711ba042df42aa3
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82987


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/extbase/Classes/Persistence/Repository.php

@@ -327,7 +327,7 @@ class Repository implements RepositoryInterface, SingletonInterface
     /**
      * Returns the class name of this class.
      *
-     * @return class-string<RepositoryInterface> Class name of the repository.
+     * @return class-string<static> Class name of the repository.
      */
     protected function getRepositoryClassName()
     {