🔧 update workflow versions (#24)

Author: willpower232

.github/workflows/main.yml

@@ -9,13 +9,19 @@ jobs:
       fail-fast: false
       matrix:
         php: [8.1, 8.2, 8.3, 8.4, 8.5]
-        symfony_process: [5, 6, 7]
+        symfony_process: [5, 6, 7, 8]
         exclude:
           - php: 8.1
             symfony_process: 7
+          - php: 8.1
+            symfony_process: 8
+          - php: 8.2
+            symfony_process: 8
+          - php: 8.3
+            symfony_process: 8
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: test against Symfony/Process ${{ matrix.symfony_process }} on PHP ${{ matrix.php }}
         run: docker build . --build-arg PHP_VERSION=${{ matrix.php }} --build-arg SYMFONY_PROCESS=${{ matrix.symfony_process }}