[CLEANUP] Followup to wizard changes

The new wizards scripts lacked a proper description.
Add the description the original files had.

Related: #56431
Releases: 6.2
Change-Id: I482d0a8c11d827c3e14da140d800df6d2caeefdc
Reviewed-on: https://review.typo3.org/27957
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel