Test this project on more platforms

Author: javiereguiluz

.github/workflows/ci.yaml

@@ -28,13 +28,16 @@ jobs:
               run: composer validate --strict
 
     stable-tests:
-        name: Stable Tests
-        runs-on: ubuntu-latest
+        name: "${{ matrix.operating-system }} / PHP ${{ matrix.php-version }}"
+        runs-on: ${{ matrix.operating-system }}
 
         strategy:
             fail-fast: false
             matrix:
-                php-version: ['7.4', '8.0', '8.1', '8.2']
+                # add here only the PHP versions and OS used in GitHub CI (for tests)
+                # and on the symfony.com server (where the Symfony Docs are built)
+                operating-system: ['ubuntu-latest']
+                php-version: ['7.4', '8.3']
 
         steps:
             - name: 'Checkout code'