fix(deps): update dependency webonyx/graphql-php to v15.12.4

Author: renovate[bot]

api/composer.json

@@ -48,7 +48,7 @@
         "symfony/yaml": "7.1.1",
         "twig/cssinliner-extra": "^3.4",
         "twig/extra-bundle": "^3.4",
-        "webonyx/graphql-php": "15.12.3"
+        "webonyx/graphql-php": "15.12.4"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "3.58.1",