[DOCS] Fix typos in Expression Builder comments

Resolves: #103820
Releases: main
Change-Id: I4731f5579b0dd62785816441dabbe87d725bc274
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84213


Tested-by: Garvin Hicking <gh@faktor-e.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Garvin Hicking <gh@faktor-e.de>