readme: code example and the description are provided to be the same

README.md

@@ -38,8 +38,8 @@ mutations, and schema modifications are presented below.
 ```java
 final class TodoQuerySchemaModule extends SchemaModule {
  @Query("listTodo")
- ListenableFuture<ListTodoResponse> listTodo(ListTodoRequest request, TodoClient todoClient) {
- return todoClient.listTodo(request);
+ ListenableFuture<ListTodoResponse> listTodo(ListTodoRequest request, TodoService todoService) {
+ return todoService.listTodo(request);
  }
 }
 ```