[BUGFIX] Fix indenting in changelog

Indenting in .rst files caused blocks to be rendered as quotes.

Resolves: #91821
Releases: master, 10.4, 9.5
Change-Id: I23b29037e5220ba1d72271b79995a8220a528139
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65056


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>