Added missing linting of workflow tests.

Author: AlexSkrypnyk

.github/workflows/vortex-test-common.yml

@@ -159,6 +159,10 @@ jobs:
         run: composer install
         working-directory: .vortex/tests
 
+      - name: Lint code
+        run: COMPOSER_MEMORY_LIMIT=-1 composer lint
+        working-directory: .vortex/tests
+
       - name: Install Ahoy
         run: |
           version=2.4.0 && \