[DOCS] Adjust guides.xml

Additionally, resolve rendering warnings

No Backports needed, v12 is already fixed with
https://review.typo3.org/c/Packages/TYPO3.CMS/+/833513

Resolves: #103349
Releases: main
Change-Id: I20a0a556dd1e00a3d4db754d7fcf5e55c90f68c5
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83359


Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: Lina Wolf <112@linawolf.de>
Tested-by: core-ci <typo3@b13.com>