[BUGFIX] Typo in Extbase localization file

Fixes: #57238
Releases: 6.2, 6.1, 6.0
Change-Id: Icca7e1637387e2ad31a1368abcd59b1bd443255f
Reviewed-on: https://review.typo3.org/28706
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers