Fix code style

Author: a-melnikov

src/Resources/views/GraphiQL/index.html.twig

@@ -34,21 +34,21 @@
   {% block body_loading %}Loading...{% endblock body_loading %}
   {% block body_script %}
     <script>
-      var endpoint = {{ endpoint | json_encode | raw }}
+      var endpoint = {{ endpoint | json_encode | raw }};
 
         function graphQLFetcher(params) {
           {% block fetcher_function_body %}
           var headers
 
           {% block graphql_fetcher_headers %}
           headers = {
-            "Accept": "application/json",
-            "Content-Type": "application/json",
+            'Accept': 'application/json',
+            'Content-Type': 'application/json',
           }
           {% endblock graphql_fetcher_headers %}
 
           return fetch(endpoint, {
-              method: "post",
+              method: 'post',
               headers: headers,
               body: JSON.stringify(params),
               credentials: 'include',