fix(deps): update dependency webonyx/graphql-php to v15.26.0

Author: renovate[bot]

api/composer.json

@@ -61,7 +61,7 @@
         "symfony/yaml": "7.3.5",
         "twig/cssinliner-extra": "^3.4",
         "twig/extra-bundle": "3.22.1",
-        "webonyx/graphql-php": "15.25.2"
+        "webonyx/graphql-php": "15.26.0"
     },
     "require-dev": {
         "api-platform/graphql": "4.1.26",