[TASK] Update php-cs-fixer to latest minor

Updates friendsofphp/php-cs-fixer from 2.11.1 to 2.12.2
The 'no_unused_imports' scanner is a bit more picky and
finds another unused import fixed along with the update.

composer update friendsofphp/php-cs-fixer

Change-Id: I40a724371c35ae4202fd8e90f43eafcb1a70c0a9
Resolves: #85621
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/57660


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>