chore(deps): update symfony packages to v8

| datasource | package        | from  | to    |
| ---------- | -------------- | ----- | ----- |
| packagist  | symfony/mailer | 7.4.0 | 8.0.0 |
| packagist  | symfony/mime   | 7.4.0 | 8.0.0 |

Author: renovate[bot]

composer.json

@@ -21,8 +21,8 @@
 		"psr/http-server-handler": "^1.0.2",
 		"psr/http-server-middleware": "^1.0.2",
 		"psr/log": "^3.0.2",
-		"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",
 		"typo3/cms-backend": "^12.0 || ^13.0 || ^14.0",
 		"typo3/cms-beuser": "^12.0 || ^13.0 || ^14.0",
 		"typo3/cms-core": "^12.0 || ^13.0 || ^14.0",