[TASK] Improve PHPDoc of ResourceStorage::sanitizeFileName

Adapt description and remove hints on exceptions which are not thrown here.

Resolves: #95149
Releases: master, 10.4
Change-Id: I5c9cf4f1d5eac3966edfab26eea763192a3c712a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70970


Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Benni Mack <benni@typo3.org>