[DOCS] Add missing links in lowlevel's Configuration module docs

Resolves: #102019
Releases: main, 12.4
Change-Id: Ib65eaf32d3bff91b943d965684eb2f0fcf25a44d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81182


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Lina Wolf <112@linawolf.de>
Tested-by: Lina Wolf <112@linawolf.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>