Update README.md (#528)

Author: JianxinDong

README.md

@@ -16,6 +16,7 @@
 🔍 Explore our models on
 [![Static Badge](https://img.shields.io/badge/-gery?style=social&label=🤗%20Huggingface)](https://huggingface.co/xtuner)
 [![Static Badge](https://img.shields.io/badge/-gery?style=social&label=🤖%20ModelScope)](https://www.modelscope.cn/organization/xtuner)
+[![Static Badge](https://img.shields.io/badge/-gery?style=social&label=🧰%20OpenXLab)](https://openxlab.org.cn/usercenter/xtuner)
 
 English | [简体中文](README_zh-CN.md)