Update README.md

Author: geekr-dev

README.md

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 # GeekChat - Free ChatGPT With Support For Text, Voice And Stream
 
+[中文文档](https://github.com/geekr-dev/geekchat/blob/main/README.zh.md)
+
 ### Introduction
 
 This is a clone of ChatGPT with support for text, voice, stream and beautiful UI, made with Laravel 10 using the ChatGPT and Audio (Whisper model) API, as well as Inertia + Vue3 + Tailwind CSS: