Docs/sangshuduo/td 13307 add desc to index (#10325)

* [TD-13307]<docs>: add description to docs index.

* fix the link of how to use taosBenchmark

* fix wrong links

* fix markdown format

* refine getting started section

* update

* fix install doc link

* fix chinese wording

* adjust section order

* adjust few format

documentation20/cn/02.getting-started/docs.md

@@ -22,8 +22,9 @@ TDengine 的安装非常简单，从下载到安装成功仅仅只要几秒钟
 
 <ul id="server-packageList" class="package-list"></ul>
 
-#### 查看完整的 Release notes，请点击[这里](https://github.com/taosdata/TDengine/releases)。
-具体的安装过程，请参见 [TDengine 多种安装包的安装和卸载](https://www.taosdata.com/cn/getting-started/install) 以及 [视频教程](https://www.taosdata.com/blog/2020/11/11/1941.html)。
+具体的安装方法，请参见 [TDengine 多种安装包的安装和卸载](https://www.taosdata.com/cn/getting-started/install) 以及 [视频教程](https://www.taosdata.com/blog/2020/11/11/1941.html)。
+
+**请点击[这里](https://github.com/taosdata/TDengine/releases)查看 release notes。**
 
 ### 使用 apt-get 安装
 
@@ -56,7 +57,7 @@ taosTools 是多个用于 TDengine 的辅助工具软件集合。目前包含用
 
 如果您希望对 TDengine 贡献代码或对内部实现感兴趣，请参考我们的 [TDengine github 主页](https://github.com/taosdata/TDengine) 下载源码构建和安装.
 
-### 下载其他组件、最新 Beta 版及之前版本的安装包，请点击[这里](https://www.taosdata.com/cn/all-downloads/)。
+**下载其他组件、最新 Beta 版及之前版本的安装包，请点击[这里](https://www.taosdata.com/cn/all-downloads/)**
 
 ## <a class="anchor" id="start"></a>轻松启动
 

documentation20/en/02.getting-started/docs.md

@@ -22,9 +22,9 @@ TDengine is very easy to install, from download to successful installation in ju
 
 <ul id="server-packageList" class="package-list"></ul>
 
-#### Click [here](https://github.com/taosdata/TDengine/releases) for Release notes
+For detailed installation steps, please refer to [How to install/uninstall TDengine with installation package](https://www.taosdata.com/en/getting-started/install).
 
-For details of the installation process, please refer to [How to install/uninstall TDengine with installation package](https://www.taosdata.com/en/getting-started/install).
+**Click [here](https://github.com/taosdata/TDengine/releases) for release notes.**
 
 ### Install TDengine by apt-get
 
@@ -57,7 +57,7 @@ To run taosdump, you need to install the TDengine server or TDengine client inst
 
 If you want to contribute to TDengine, please visit [TDengine GitHub page](https://github.com/taosdata/TDengine) for detailed instructions on build and installation from the source code.
 
-### To download other components, beta, or early releases, please click [here](https://www.taosdata.com/cn/all-downloads/)
+**To download other components, beta, or early releases, please click [here](https://www.taosdata.com/cn/all-downloads/)**
 
 ## <a class="anchor" id="start"></a>Quick Launch