[BUGFIX] Fix typo in locallang.xlf for sysext/beuser

Resolves: #99082
Related: #99038
Releases: main
Change-Id: Icefd1b4ac8a2ae4cefee51ac9cecfd24e4f989a2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76597


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