docs(README): 增加文档迁移的提示 (#121)

Author: dezhishen

docs/README.md

@@ -4,7 +4,7 @@ icon: iconfont icon-home
 title: Home
 heroImage: /logo.svg
 heroText: OpenList
-tagline: 🗂️ A file list program that supports multiple storage, powered by Gin and Solidjs.
+tagline: 🗂️ A file list program that supports multiple storage, powered by Gin and Solidjs.<br/>⚠️ The old version of the documentation has been discontinued. The new documentation repository is https://github.com/OpenListTeam/OpenList-Docs 
 actions:
   - text: Get started💡
     link: /guide/

docs/zh/README.md

@@ -4,7 +4,7 @@ icon: iconfont icon-home
 title: Home
 heroImage: /logo.svg
 heroText: OpenList
-tagline: 🗂️ 一个支持多种存储的文件列表程序，使用 Gin 和 Solidjs。
+tagline: 🗂️ 一个支持多种存储的文件列表程序，使用 Gin 和 Solidjs。<br/>⚠️ 旧版文档已停用，新文档仓库为 https://github.com/OpenListTeam/OpenList-Docs 
 actions:
   - text: 开始💡
     link: /zh/guide/