[TASK] Update symfony packages (^6.4 || ^7.0 => ^6.4 || ^7.0 || ^8.0)

Author: renovate[bot]

composer.json

@@ -17,8 +17,8 @@
     ],
     "require": {
         "php": "^8.0",
-        "symfony/mailer": "^6.4 || ^7.0",
-        "symfony/mime": "^6.4 || ^7.0",
+        "symfony/mailer": "^6.4 || ^7.0 || ^8.0",
+        "symfony/mime": "^6.4 || ^7.0 || ^8.0",
         "tijsverkoyen/css-to-inline-styles": "^2.2",
         "typo3/cms-core": "^12.4 || ^13.4"
     },