[DOCS] Update Settings.cfg in EXT:form

Update Settings.cfg to current standards.

Releases: master
Resolves: #91765
Change-Id: I868f4823ff4d5dbb837e209e71836cbf1b77af4f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65004


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>