[BUGFIX] Allow changing record data in event

The new event PageContentPreviewRenderingEvent
introduced in TYPO3 v12 now allows to modify
the record itself, making it as flexible as the previous
hook.

Resolves: #99026
Releases: main
Change-Id: I475c797c88e765972a915f77aeb0f0441d7548d1
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76514


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>