update doc link

Author: njleonzhang

docs/index.html

@@ -15,7 +15,7 @@
 <script src="https://cdn.bootcss.com/react/15.6.1/react-dom.js"></script>
 <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
 <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/vue.css" >
-<script src="//unpkg.com/[email protected].1/dist/docsify-demo-box-react.min.js"></script>
+<script src="//unpkg.com/[email protected].2/dist/docsify-demo-box-react.min.js"></script>
 <script>
   var jsResources = '<scr' + 'ipt src="//cdn.bootcss.com/react/15.6.1/react.js"></scr' + 'ipt>\n' +
     '<scr' + 'ipt src="//cdn.bootcss.com/react/15.6.1/react-dom.js"></scr' + 'ipt>'