[DOCS] Correct information regarding ipAnonymization setting

Resolves: #85653
Releases: master, 9.5
Change-Id: Idda07be57a1774362b2aea0ea6e019a0c4f7a6e2
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63753


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Josef Glatz <josefglatz@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>