[DOCS] Review changelogs for v12.1 release

Resolves: #99266
Releases: main
Change-Id: Ife02422e05d88ea8935c020ccf785aa0a014e9da
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/76917


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>