[BUGFIX] Tighten a conditional check in LinkService

Resolves: #97741
Releases: main
Change-Id: Ic346680b2f3fcaf8ffef5f9b9bd1cb903da61e0b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74826


Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>