fix: remove operation name

lib/utils/request_serilizer.dart

@@ -0,0 +1,21 @@
+import "package:gql/execution.dart";
+import "package:gql/language.dart";
+import 'package:gql_link/gql_link.dart';
+
+class GithubRequestSerializer extends RequestSerializer {
+  const GithubRequestSerializer();
+
+  @override
+  Map<String, dynamic> serializeRequest(Request request) {
+    final RequestExtensionsThunk thunk = request.context.entry();
+
+    return <String, dynamic>{
+      // Remove operationName here for GitHub API compatibility
+      // "operationName": request.operation.operationName,
+      "variables": request.operation.variables,
+      "query": printNode(request.operation.document),
+      if (thunk != null)
+        "extensions": thunk.getRequestExtensions(request),
+    };
+  }
+}