[BUGFIX] Correct indention of class comment

Fixes: #44343
Releases: 6.1
Change-Id: I4acc9b50d7534f16ba7dca8bbdb34de1db3beac0
Reviewed-on: https://review.typo3.org/17394
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring