bug: `^2.2.6` 中 `toc: content` 异常！

[ayangweb]

Versions

• dumi: 2.2.6
• node: 18.16.0
• npm: 9.5.1
• OS: MacOS 12.6 M1 Pro
• Browser: Chrome 版本 116.0.5845.96（正式版本） (arm64)

Steps to reproduce

https://github.com/ayangweb/dumi-test

What is actually happening?

切换路由丢失！

[github-actions[bot]]

Hello @ayangweb. We totally like your proposal/feedback, welcome to send us a Pull Request for it. Please be sure to fill in the default template in the Pull Request, provide changelog/documentation/test cases if needed and make sure CI passed, we will review it soon. We appreciate your effort in advance and looking forward to your contribution!

你好 @ayangweb，我们完全同意你的提议/反馈，欢迎直接在此仓库创建一个 Pull Request 来解决这个问题。请务必填写 Pull Request 内的预设模板，提供改动所需相应的 changelog、测试用例、文档等，并确保 CI 通过，我们会尽快进行 Review，提前感谢和期待您的贡献。

[PeachScript]

关键位置：https://github.com/umijs/dumi/blob/8c91a070de7c06658bf796d724e58286e546c247/src/client/theme-default/slots/Toc/index.tsx#L41 原因：获取 DOM 的时候内容区域还未渲染完毕