[TASK] Update friendsofphp/php-cs-fixer requirement (#100)

Updates the requirements on [friendsofphp/php-cs-fixer](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer) to permit the latest version.
- [Release notes](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/releases)
- [Changelog](https://github.com/PHP-CS-Fixer/PHP-CS-Fixer/blob/master/CHANGELOG.md)
- [Commits](PHP-CS-Fixer/PHP-CS-Fixer@v3.67.1...v3.68.1)

---
updated-dependencies:
- dependency-name: friendsofphp/php-cs-fixer
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -24,7 +24,7 @@
     },
     "require-dev": {
         "ergebnis/composer-normalize": "^2.45.0",
-        "friendsofphp/php-cs-fixer": "^3.67.1",
+        "friendsofphp/php-cs-fixer": "^3.68.1",
         "friendsoftypo3/phpstan-typo3": "^0.9.0",
         "phpstan/phpstan": "^1.12.7",
         "phpstan/phpstan-phpunit": "^1.4.0",