chore: update CI after release of symfony 7.4 and 8.0

Author: alexislefebvre

.github/workflows/ci-linux.yaml

@@ -53,14 +53,12 @@ jobs:
                       symfony-version: '6.4.*'
                       dependency-versions: 'lowest'
 
-                    # unreleased Symfony 7.4
                     - php-version: '8.2'
-                      symfony-version: '^7.4.0-RC2'
+                      symfony-version: '^7.4.0'
                       dependency-versions: 'highest'
 
-                    # unreleased Symfony 8.0
                     - php-version: '8.4'
-                      symfony-version: '^8.0.0-RC2'
+                      symfony-version: '^8.0.0'
                       dependency-versions: 'highest'
 
         steps: