文档有误 #4698

Describe the bug

文档没有G6.Util.mix 这个方法 <img width="692" alt="image" src="https://github.com/antvis/G6/assets/33367187/0b994b79-8045-445d-9d05-6acdad8c70cd">

Your Example Website or App

无

Steps to Reproduce the Bug or Issue

无

Expected behavior

希望文档正确

Screenshots or Videos

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Platform

• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Version: [e.g. 91.1]
• 无

Additional context

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