[BUGFIX] Fix phpDoc comment for addStaticFile()

The method
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile()
should be called in ext_tables.php files since it manipulates the
TCA.

Resolves: #51939
Change-Id: I75f099fb5d64ee1e11867c41728b2747a666ebfd