Update tests to work around segfault on PHP 8.4.4 with Xdebug 3.5.0-beta

Author: clue

.github/workflows/ci.yml

@@ -25,6 +25,7 @@ jobs:
       - uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
+          extensions: xdebug-stable # temporarily force stable Xdebug due to segfault on PHP 8.4.4 with 3.5.0-beta
           coverage: xdebug
           ini-file: development
       - run: composer install