Update .github/workflows/test-application.yaml

Author: alexander-schranz

.github/workflows/test-application.yaml

@@ -59,7 +59,7 @@ jobs:
             fail-fast: false
             matrix:
                 include:
-                    - php-version: '7.4'
+                    - php-version: '8.1'
 
         steps:
             - name: Checkout project