[TASK] Fix Changelog/13.0 RST markup errors

Mostly those are formatting changes of bad spacing and missing colons.
Code-blocks are used where applicable.

Resolves: #101755
Releases: main
Change-Id: I507b9c376108d45cb8123525dddb55a28a4e1949
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80696


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Reviewed-by: Torben Hansen <derhansen@gmail.com>
Tested-by: Torben Hansen <derhansen@gmail.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Thomas Hohn <tho@gyldendal.dk>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>