CI: Utilize stable version for relay-ext

Author: ostrolucky

.github/workflows/continuous-integration.yml

@@ -77,7 +77,7 @@ jobs:
         uses: "shivammathur/setup-php@v2"
         with:
           php-version: "${{ matrix.php-version }}"
-          extensions: "${{ matrix.php-extensions }},relay-dev"
+          extensions: "${{ matrix.php-extensions }},relay"
           ini-values: "zend.assertions=1, max_execution_time=30"
 
       - name: "Install symfony/flex"