A broken anchor link in README_CN.md

[sunner]

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Provide a description of requested docs changes

The link 入门指南 should be 入门指南

[dosubot[bot]]

Hey there, @sunner! 👋 I'm here to help you with any bugs, questions, or contributions you have while waiting for a human maintainer. I'm Dosu, a bot designed to assist you throughout your GitHub journey.

To fix the broken anchor link in README_CN.md, change the link from [入门指南](https://github.com/langgenius/dify/blob/main/README_CN.md#quick-start) to [入门指南](https://github.com/langgenius/dify/blob/main/README_CN.md#快速启动). The correct anchor should be #快速启动 as indicated by the section title "### 快速启动" in the document ^[1].

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