fix huge mistake (#77)

Author: egoist

docs/index.html

@@ -23,7 +23,7 @@
 <!-- don't remove this part start -->
 <div id="app"></div>
 <script src="https://unpkg.com/docute@3/plugins/docsearch.js"></script>
-<script src="https://unpkg.com/docute@3/docute.js"></script>
+<script src="https://unpkg.com/docute@3/dist/docute.js"></script>
 <script src="./config.js"></script>
 <!-- don't remove this part end -->
 </body>