[TASK] Fix code example in feature rst of #84112

Resolves: #90189
Releases: master
Change-Id: I512678ca95fc0b836a26fc91712853ddd88cb78e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63020


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>