[TASK] Fix typo in documentation intent-left > indent-left

Releases: master, 8.7
Resolves: #81253
Change-Id: I9920ba02349d51925610c2bd04fd8c3ea668e3a6
Reviewed-on: https://review.typo3.org/52832


Reviewed-by: Riccardo De Contardi <erredeco@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Philipp Gampe <philipp.gampe@typo3.org>
Tested-by: Philipp Gampe <philipp.gampe@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>