[TASK] Drop support for Symfony 5.x (#1583)

As we now require TYPO3 >= 12LTS, and as that version requires
Symfony >= 6.x, we now can safely drop support for Symfony 5.x

composer.json

@@ -64,9 +64,9 @@
 		"spaze/phpstan-disallowed-calls": "4.2.1",
 		"ssch/typo3-rector": "2.12.2",
 		"ssch/typo3-rector-testing-framework": "2.0.1",
-		"symfony/console": "5.4.47 || 6.4.17 || 7.2.1",
-		"symfony/translation": "5.4.45 || 6.4.13 || 7.2.2",
-		"symfony/yaml": "5.4.45 || 6.4.18 || 7.2.3",
+		"symfony/console": "6.4.17 || 7.2.1",
+		"symfony/translation": "6.4.13 || 7.2.2",
+		"symfony/yaml": "6.4.18 || 7.2.3",
 		"tomasvotruba/cognitive-complexity": "0.2.3",
 		"tomasvotruba/type-coverage": "1.0.0",
 		"typo3/cms-fluid-styled-content": "^12.4.26",