[DOCS] Fix title format of changelog

Resolves: #95306
Releases: master
Change-Id: I9dfeef91bc22eb4abf67759f1eb9286061c9b42c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71172


Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>