优化安装链接

.vuepress/config.js

@@ -40,7 +40,7 @@ module.exports = {
   themeConfig: {
     nav: [
       { text: '简介', link: '/overview/' },
-      { text: '安装', link: '/install/' },
+      { text: '安装', link: '/install/install-dashboard' },
       { text: '使用', link: '/guide/' },
       { text: '支持', link: '/support/' },
     ],
@@ -85,13 +85,6 @@ module.exports = {
       ],
 
       '/install/': [
-        {
-          title: '概述',
-          collapsable: false,
-          children: [
-            ''
-          ]
-        },
         {
           title: '安装 Kubernetes',
           collapsable: false,

.vuepress/theme/layouts/Layout.vue

@@ -6,7 +6,7 @@
           <a href="/overview/" class="nav-link">简介</a>
         </div>
         <div class="side-nav-item" :style="activeLinkStyle('/install/')">
-          <a href="/install/" class="nav-link router-link-exact-active router-link-active">安装</a>
+          <a href="/install/install-dashboard" class="nav-link router-link-exact-active router-link-active">安装</a>
         </div>
         <div class="side-nav-item" :style="activeLinkStyle('/guide/')">
           <a href="/guide/" class="nav-link">使用</a>