🐛[BUG] Build error in react 19

### 🐛 bug 描述

### 📷 复现步骤

### 🏞 期望结果

### 💻 复现代码

[可复现 demo](https://codesandbox.io/s/html2ksetch-demo-m53be?file=/src/Demo.tsx)

### © 版本信息

- @ant-design/pro-chat 版本: [e.g. 1.0.0]
- 浏览器环境
- 开发环境 [e.g. mac OS]

### 🚑 其他信息

When I want to build my react project that contain pro-chat, it's encounter error in build due deprecation of react-markdown. react-markdown is one the dependency of pro-chat.

Start with the linked CodeSandbox demo and inspect the build error involving the react-markdown dependency of pro-chat. Confirm the failure in a React 19 project and identify the dependency-related change needed for the project to build successfully.

Written by the indexing model from the issue text.