[CI] Update to Symfony 8.0.0-BETA1

Author: Kocal

.github/workflows/ci-linux.yaml

@@ -53,7 +53,7 @@ jobs:
                       symfony-version: '6.4.*'
                       dependency-versions: 'lowest'
                     - php-version: '8.4'
-                      symfony-version: '8.0.x-dev'
+                      symfony-version: '^8.0.0-BETA1'
                       dependency-versions: 'highest'
 
         steps: