docs: fix home theme flick (#39083)

* docs: fix home theme flick

* docs: fix link

.dumi/pages/index/components/Theme/index.tsx

@@ -422,7 +422,7 @@ export default function Theme() {
               />
             </Space>
           </Header>
-          <Layout css={style.transBg}>
+          <Layout css={style.transBg} hasSider>
             <Sider css={style.transBg} width={200} className="site-layout-background">
               <Menu
                 mode="inline"

docs/react/migration-v5.en-US.md

@@ -3,7 +3,7 @@ order: 8
 title: V4 to V5
 ---
 
-This document will help you upgrade from antd `4.x` version to antd `5.x` version. If you are using `3.x` or older version, please refer to the previous [upgrade document](/docs/react/migration-v4) to 4.x.
+This document will help you upgrade from antd `4.x` version to antd `5.x` version. If you are using `3.x` or older version, please refer to the previous [upgrade document](https://4x.ant.design/docs/react/migration-v4) to 4.x.
 
 ## Upgrade preparation
 

docs/react/migration-v5.zh-CN.md

@@ -3,7 +3,7 @@ order: 8
 title: 从 v4 到 v5
 ---
 
-本文档将帮助你从 antd `4.x` 版本升级到 antd `5.x` 版本，如果你是 `3.x` 或者更老的版本，请先参考之前的[升级文档](/docs/react/migration-v4-cn)升级到 4.x。
+本文档将帮助你从 antd `4.x` 版本升级到 antd `5.x` 版本，如果你是 `3.x` 或者更老的版本，请先参考之前的[升级文档](https://4x.ant.design/docs/react/migration-v4-cn)升级到 4.x。
 
 ## 升级准备