chore(docs): download chrome extension from github release (#1007)

Author: EAGzzyCSL

apps/site/docs/en/quick-experience.mdx

@@ -20,6 +20,8 @@ Midscene.js provides a Chrome extension. By using it, you can quickly experience
 
 Install Midscene extension from chrome web store: [Midscene](https://chromewebstore.google.com/detail/midscene/gbldofcpkknbggpkmbdaefngejllnief)
 
+Or download the installation package and install it manually (**not recommended, as automatic updates cannot be obtained**)：[Releases](https://github.com/web-infra-dev/midscene/releases)
+
 Start the extension (may be folded by Chrome extension icon), setup the config by pasting the config in the K=V format:
 
 ```bash

apps/site/docs/zh/quick-experience.mdx

@@ -20,6 +20,8 @@ import PrepareKeyForFurtherUse from './common/prepare-key-for-further-use.mdx';
 
 前往 Chrome 扩展商店安装 Midscene 扩展：[Midscene](https://chromewebstore.google.com/detail/midscene/gbldofcpkknbggpkmbdaefngejllnief)
 
+或下载安装包手动安装（**不推荐，无法获得自动更新**）：[Releases](https://github.com/web-infra-dev/midscene/releases)
+
 启动扩展（可能默认折叠在 Chrome 扩展列表中），通过粘贴 Key=Value 格式配置插件环境：
 
 ```bash