[BUGFIX] The Install Tool welcome text is outdated

Updates the welcome text of the Install Tool with
information about the new modules.

Resolves: #53081
Releases: 6.2
Change-Id: I30b486a7503ca3c62675c33725c3483190b919ea
Reviewed-on: https://review.typo3.org/25125
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind
Reviewed-by: Tomita Militaru
Tested-by: Tomita Militaru
Reviewed-by: Markus Klein
Tested-by: Markus Klein