message: docs: Fix usage of graphiql in umd
diff: @@ -142,7 +142,7 @@ The most minimal way to set up GraphiQL is a single index.html file:
  ></script>
  <script>
  - const fetcher = GraphiQL.createFetcher('https://my/graphql');
  + const fetcher = GraphiQL.createFetcher({ url: 'https://my/graphql' });
  ReactDOM.render(
  React.createElement(GraphiQL, { fetcher: fetcher }),
  