docs: fix a 404 link (#1373)

Author: sinchang

packages/docs/docs/zh/plugin/official/plugin-active-header-links.md

@@ -3,7 +3,7 @@ title: active-header-links
 metaTitle: 页面滚动时自动激活侧边栏链接的插件 | VuePress
 ---
 
-# [@vuepress/plugin-active-header-links](https://github.com/vuejs/vuepress/tree/master/packages/@vuepress/plugin-active-header-linksd)
+# [@vuepress/plugin-active-header-links](https://github.com/vuejs/vuepress/tree/master/packages/@vuepress/plugin-active-header-links)
 
 > 页面滚动时自动激活侧边栏链接的插件
 
@@ -18,7 +18,7 @@ yarn add -D @vuepress/plugin-active-header-links
 
 ```javascript
 module.exports = {
-  plugins: ['@vuepress/active-header-links'] 
+  plugins: ['@vuepress/active-header-links']
 }
 ```