Update symfony packages to v8

Author: renovate[bot]

composer.json

@@ -29,9 +29,9 @@
         "phpstan/phpstan-phpunit": "^1.4.0",
         "phpunit/phpunit": "^10.5.37",
         "psr/http-message": "^1.0 || ^2.0",
-        "symfony/dotenv": "^6.4|^7.1.5",
-        "symfony/http-client": "^6.4|^7.1.5",
-        "symfony/http-foundation": "^6.4|^7.1.5"
+        "symfony/dotenv": "8.0.0",
+        "symfony/http-client": "8.0.5",
+        "symfony/http-foundation": "8.0.5"
     },
     "suggest": {
         "symfony/http-client": "As asynchronous HTTP Client"