[TASK] Prepare Changelog for v12.2

Resolves: #99780
Releases: main
Change-Id: I5e40fb8b6470c929001da06a8d1a7a7dbcaec0db
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77688


Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: Lina Wolf <112@linawolf.de>