Fix comment in workflow

Author: swissspidy

.github/workflows/copilot-setup-steps.yml

@@ -36,7 +36,7 @@ jobs:
 
       - name: Install Composer dependencies & cache dependencies
         if: steps.check_composer_file.outputs.files_exists == 'true'
-        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # v3
+        uses: ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda # v4
         env:
           COMPOSER_ROOT_VERSION: dev-${{ github.event.repository.default_branch }}
         with: