[BUGFIX] Fix wrong reference to language file in FileList class

During a backport of #80920 the file reference was not updated to
the right location.

Resolves: #83187
Releases: 7.6
Change-Id: I20637d1d1ee26f892084909c600cbe43a7c46a02
Reviewed-on: https://review.typo3.org/54900


Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>