Update index.html.js

Updated JS section to reference [graphql-request](https://github.com/graphcool/graphql-request) instead of Lokka as work on Lokka is discontinued.

Author: nikolasburk

site/code/index.html.js

@@ -391,7 +391,7 @@ Executor.execute(schema, query) map println
 
   - [Relay](https://facebook.github.io/relay/) ([github](https://github.com/facebook/relay)) ([npm](https://www.npmjs.com/package/react-relay)): Facebook's framework for building React applications that talk to a GraphQL backend.
   - [Apollo Client](http://dev.apollodata.com/react/) ([github](https://github.com/apollostack/apollo-client)): A powerful JavaScript GraphQL client, designed to work well with React, React Native, Angular 2, or just plain JavaScript.
-  - [Lokka](https://github.com/kadirahq/lokka): A simple JavaScript GraphQL client that works in all JavaScript environments - the browser, Node.js, and React Native.
+  - [graphql-request](https://github.com/graphcool/graphql-request): A simple and lightweight JavaScript GraphQL client that works in all JavaScript environments - the browser, Node.js, and React Native.
 
 ### Swift / Objective-C iOS