[BUGFIX] Fix description of userHomePath and groupHomePath

Since making userHomePath and groupHomePath FAL compatible
the descriptions in DefaultConfiguration don't fit anymore.

Resolves: #56986
Releases: 6.2, 6.1
Change-Id: Ia27193b967137dd3744c2fdcf5b5b0d3366c0080
Reviewed-on: https://review.typo3.org/29838
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring