[TASK] Fix typo in CSP module description

Resolves: #102772
Releases: main, 12.4
Change-Id: I483a54dc85e0505b336634c55709c543075a3b13
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/82379


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>