docs: remove next tag (#2009)

Author: Sun Haoran

Diff for: packages/docs/docs/plugin/official/plugin-active-header-links.md

@@ -10,8 +10,8 @@ metaTitle: A plugin of automatically activating sidebar links when page scrolls
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-active-header-links@next
-# OR npm install -D @vuepress/plugin-active-header-links@next
+yarn add -D @vuepress/plugin-active-header-links
+# OR npm install -D @vuepress/plugin-active-header-links
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-back-to-top.md

@@ -10,8 +10,8 @@ metaTitle: Back-To-Top Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-back-to-top@next
-# OR npm install -D @vuepress/plugin-back-to-top@next
+yarn add -D @vuepress/plugin-back-to-top
+# OR npm install -D @vuepress/plugin-back-to-top
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-medium-zoom.md

@@ -10,8 +10,8 @@ metaTitle: Medium-Zoom Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-medium-zoom@next
-# OR npm install -D @vuepress/plugin-medium-zoom@next
+yarn add -D @vuepress/plugin-medium-zoom
+# OR npm install -D @vuepress/plugin-medium-zoom
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-nprogress.md

@@ -10,8 +10,8 @@ metaTitle: Nprogress Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-nprogress@next
-# OR npm install -D @vuepress/plugin-nprogress@next
+yarn add -D @vuepress/plugin-nprogress
+# OR npm install -D @vuepress/plugin-nprogress
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-pwa.md

@@ -10,8 +10,8 @@ metaTitle: PWA Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-pwa@next
-# OR npm install -D @vuepress/plugin-pwa@next
+yarn add -D @vuepress/plugin-pwa
+# OR npm install -D @vuepress/plugin-pwa
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-register-components.md

@@ -10,8 +10,8 @@ metaTitle: Register Components Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-register-components@next
-# OR npm install -D @vuepress/plugin-register-components@next
+yarn add -D @vuepress/plugin-register-components
+# OR npm install -D @vuepress/plugin-register-components
 ```
 
 ## Usage

Diff for: packages/docs/docs/plugin/official/plugin-search.md

@@ -10,8 +10,8 @@ metaTitle: Search Plugin | VuePress
 ## Install
 
 ```bash
-yarn add -D @vuepress/plugin-search@next
-# OR npm install -D @vuepress/plugin-search@next
+yarn add -D @vuepress/plugin-search
+# OR npm install -D @vuepress/plugin-search
 ```
 
 ::: tip

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

@@ -10,8 +10,8 @@ metaTitle: 页面滚动时自动激活侧边栏链接的插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-active-header-links@next
-# OR npm install -D @vuepress/plugin-active-header-links@next
+yarn add -D @vuepress/plugin-active-header-links
+# OR npm install -D @vuepress/plugin-active-header-links
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-back-to-top.md

@@ -10,8 +10,8 @@ metaTitle: Back-To-Top 插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-back-to-top@next
-# OR npm install -D @vuepress/plugin-back-to-top@next
+yarn add -D @vuepress/plugin-back-to-top
+# OR npm install -D @vuepress/plugin-back-to-top
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-medium-zoom.md

@@ -10,8 +10,8 @@ metaTitle: Medium-Zoom 插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-medium-zoom@next
-# OR npm install -D @vuepress/plugin-medium-zoom@next
+yarn add -D @vuepress/plugin-medium-zoom
+# OR npm install -D @vuepress/plugin-medium-zoom
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-nprogress.md

@@ -10,8 +10,8 @@ metaTitle: Nprogress 插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-nprogress@next
-# 或者 npm install -D @vuepress/plugin-nprogress@next
+yarn add -D @vuepress/plugin-nprogress
+# 或者 npm install -D @vuepress/plugin-nprogress
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-pwa.md

@@ -10,8 +10,8 @@ metaTitle: PWA 插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-pwa@next
-# OR npm install -D @vuepress/plugin-pwa@next
+yarn add -D @vuepress/plugin-pwa
+# OR npm install -D @vuepress/plugin-pwa
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-register-components.md

@@ -10,8 +10,8 @@ metaTitle: 注册组件的插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-register-components@next
-# OR npm install -D @vuepress/plugin-register-components@next
+yarn add -D @vuepress/plugin-register-components
+# OR npm install -D @vuepress/plugin-register-components
 ```
 
 ## 使用

Diff for: packages/docs/docs/zh/plugin/official/plugin-search.md

@@ -10,8 +10,8 @@ metaTitle: Search 插件 | VuePress
 ## 安装
 
 ```bash
-yarn add -D @vuepress/plugin-search@next
-# OR npm install -D @vuepress/plugin-search@next
+yarn add -D @vuepress/plugin-search
+# OR npm install -D @vuepress/plugin-search
 ```
 
 ::: tip