docs: update vant demo url (#10641)

README.md

@@ -87,7 +87,7 @@ Vant 3/4 supports modern browsers and Chrome >= 51、iOS >= 10.0 (same as Vue 3)
 | Project | Description |
 | --- | --- |
 | [vant-weapp](https://github.com/youzan/vant-weapp) | WeChat MiniProgram UI |
-| [vant-demo](https://github.com/youzan/vant-demo) | Collection of Vant demos |
+| [vant-demo](https://github.com/vant-ui/vant-demo) | Collection of Vant demos |
 | [vant-cli](https://github.com/youzan/vant/tree/dev/packages/vant-cli) | Scaffold for UI library |
 | [vant-icons](https://github.com/youzan/vant/tree/dev/packages/vant-icons) | Vant icons |
 | [vant-touch-emulator](https://github.com/youzan/vant/tree/dev/packages/vant-touch-emulator) | Using vant in desktop browsers |

README.zh-CN.md

@@ -93,7 +93,7 @@ Vant 3/4 支持现代浏览器以及 Chrome >= 51、iOS >= 10.0（与 Vue 3 一
 | 项目 | 描述 |
 | --- | --- |
 | [vant-weapp](https://github.com/youzan/vant-weapp) | Vant 微信小程序版 |
-| [vant-demo](https://github.com/youzan/vant-demo) | Vant 官方示例合集 |
+| [vant-demo](https://github.com/vant-ui/vant-demo) | Vant 官方示例合集 |
 | [vant-cli](https://github.com/youzan/vant/tree/dev/packages/vant-cli) | 开箱即用的组件库搭建工具 |
 | [vant-icons](https://github.com/youzan/vant/tree/dev/packages/vant-icons) | Vant 图标库 |
 | [vant-touch-emulator](https://github.com/youzan/vant/tree/dev/packages/vant-touch-emulator) | 在桌面端使用 Vant 的辅助库 |

packages/vant/docs/markdown/home.en-US.md

@@ -39,7 +39,7 @@ Vant 3/4 supports modern browsers and Chrome >= 51、iOS >= 10.0 (same as Vue 3)
 | Project | Description |
 | --- | --- |
 | [vant-weapp](https://github.com/youzan/vant-weapp) | WeChat MiniProgram UI |
-| [vant-demo](https://github.com/youzan/vant-demo) | Collection of Vant demos |
+| [vant-demo](https://github.com/vant-ui/vant-demo) | Collection of Vant demos |
 | [vant-cli](https://github.com/youzan/vant/tree/dev/packages/vant-cli) | Scaffold for UI library |
 | [vant-icons](https://github.com/youzan/vant/tree/dev/packages/vant-icons) | Vant icons |
 | [vant-touch-emulator](https://github.com/youzan/vant/tree/dev/packages/vant-touch-emulator) | Using vant in desktop browsers |

packages/vant/docs/markdown/home.zh-CN.md

@@ -51,7 +51,7 @@ Vant 3/4 支持现代浏览器以及 Chrome >= 51、iOS >= 10.0（与 Vue 3 一
 | 项目 | 描述 |
 | --- | --- |
 | [vant-weapp](https://github.com/youzan/vant-weapp) | Vant 微信小程序版 |
-| [vant-demo](https://github.com/youzan/vant-demo) | Vant 官方示例合集 |
+| [vant-demo](https://github.com/vant-ui/vant-demo) | Vant 官方示例合集 |
 | [vant-cli](https://github.com/youzan/vant/tree/dev/packages/vant-cli) | 开箱即用的组件库搭建工具 |
 | [vant-icons](https://github.com/youzan/vant/tree/dev/packages/vant-icons) | Vant 图标库 |
 | [vant-touch-emulator](https://github.com/youzan/vant/tree/dev/packages/vant-touch-emulator) | 在桌面端使用 Vant 的辅助库 |
@@ -70,7 +70,6 @@ Vant 3/4 支持现代浏览器以及 Chrome >= 51、iOS >= 10.0（与 Vue 3 一
 | [@antmjs/vantui](https://github.com/antmjs/vantui) | 基于 Vant Weapp 开发的多端组件库，同时支持 Taro 和 React |
 | [sfc-playground-vant](https://github.com/zhixiaoqiang/sfc-playground-vant) | Vant Playground. 当前仅支持 Vant 3.0 以上 |
 
-
 ### 其他链接
 
 - [意见反馈](https://github.com/youzan/vant/issues)

packages/vant/docs/markdown/quickstart.zh-CN.md

@@ -80,7 +80,7 @@ pnpm add vant
 
 ### 示例工程
 
-我们提供了丰富的[示例工程](https://github.com/youzan/vant-demo)，通过示例工程你可以了解如下内容：
+我们提供了丰富的[示例工程](https://github.com/vant-ui/vant-demo)，通过示例工程你可以了解如下内容：
 
 - 基于 Vite 和 Vant 搭建应用
 - 基于 Nuxt 和 Vant 搭建应用

packages/vant/docs/markdown/theme.zh-CN.md

@@ -10,7 +10,7 @@ Vant 提供了一套默认主题，CSS 命名采用 BEM 的风格，方便使用
 
 ### 示例工程
 
-我们提供了一个基于 Vue CLI 3 的示例工程，仓库地址为 [Vant Demo](https://github.com/youzan/vant-demo)，其中包含了定制主题的基本配置，可以作为参考。
+我们提供了一个基于 Vue CLI 3 的示例工程，仓库地址为 [Vant Demo](https://github.com/vant-ui/vant-demo)，其中包含了定制主题的基本配置，可以作为参考。
 
 ### 样式变量