[TASK] Add missing space in tt_content.php

Resolves: #97855
Releases: main, 11.5
Change-Id: I2cff602b6b77f451061024797adec94713f8b82e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75032


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benni Mack <benni@typo3.org>