[docs update] manually sync fork error message/doc is outdated

[joetsuihk]

🥰 需求描述

when workflow upstream sync Sync heck failed, there is a description about fixing it manually, linking to

• https://github.com/Yidadaa/ChatGPT-Next-Web/blob/main/README_CN.md#%E6%89%93%E5%BC%80%E8%87%AA%E5%8A%A8%E6%9B%B4%E6%96%B0"
• https://github.com/Yidadaa/ChatGPT-Next-Web#enable-automatic-updates

🧐 解决方案

these links's doc are outdated. correct one is located in #5535 (comment)

📝 补充信息

No response

[nextchat-manager]

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