update cdn version

Author: QingWei-Li

Diff for: docs/index.html

@@ -7,10 +7,10 @@
   <meta name="keywords" content="doc,docs,documentation,gitbook,creator,generator,github,jekyll,github-pages">
   <meta name="description" content="A magical documentation generator.">
   <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify/lib/themes/vue.css" title="vue">
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify/lib/themes/dark.css" title="dark" disabled>
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify/lib/themes/buble.css" title="buble" disabled>
-  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify/lib/themes/pure.css" title="pure" disabled>
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@latest/lib/themes/vue.css" title="vue">
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@latest/lib/themes/dark.css" title="dark" disabled>
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@latest/lib/themes/buble.css" title="buble" disabled>
+  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/docsify@latest/lib/themes/pure.css" title="pure" disabled>
   <style>
     nav.app-nav li ul {
       min-width: 100px;
@@ -66,8 +66,8 @@
     ]
   }
 </script>
-<script src="//cdn.jsdelivr.net/npm/docsify/lib/docsify.min.js"></script>
-<script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/search.min.js"></script>
+<script src="//cdn.jsdelivr.net/npm/docsify@latest/lib/docsify.min.js"></script>
+<script src="//cdn.jsdelivr.net/npm/docsify@latest/lib/plugins/search.min.js"></script>
 <script src="//cdn.jsdelivr.net/npm/prismjs/components/prism-bash.min.js"></script>
 <script src="//cdn.jsdelivr.net/npm/prismjs/components/prism-markdown.min.js"></script>
 <script src="//cdn.jsdelivr.net/npm/prismjs/components/prism-nginx.min.js"></script>