Run the dev deps workflow against Symfony 8

Author: derrabus

.github/workflows/continuous-integration.yml

@@ -231,12 +231,15 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "7.4"
+          - "8.4"
 
     steps:
       - name: "Checkout"
         uses: "actions/checkout@v4"
 
+      - name: "Force Symfony 8"
+        run: "composer require --no-update --dev symfony/console:^8 symfony/cache:^8"
+
       - name: "Install PHP"
         uses: "shivammathur/setup-php@v2"
         with: