fix: missed quick start in navigation

aio/content/guide/quickstart.md

@@ -140,17 +140,12 @@ It takes time to set up a new project, most of it spent installing npm packages.
 
 
 <h2 id='serve'>
- 
-  <p>
   Step 3: Serve the application
-  </p>
-
-  <p>
-    步骤3. 启动开发服务器
-  </p>
-
 </h2>
 
+<h2 id='serve'>
+  步骤3. 启动开发服务器
+</h2>
 
 
 Go to the project directory and launch the server.

aio/content/navigation.json

@@ -34,8 +34,21 @@
     },
 
     {
+      "url": "guide/docs-style-guide",
+      "title": "文档风格指南",
+      "tooltip": "给文档作者的风格指南",
+      "hidden": true
+    },
+
+    {
+      "url": "guide/quickstart",
       "title": "快速起步",
-      "tooltip": "Angular 破冰",
+      "tooltip": "Angular 破冰"
+    },
+
+    {
+      "title": "教程",
+      "tooltip": "此《英雄指南》教程会带你用 TypeScript 一步步创建一个 Angular 应用。",
       "children": [
         {
           "url": "tutorial",