Add Model Scope demo badge to README

Added a new badge for Model Scope demo in the README.

Author: ChenZiHong-Gavin

README.md

@@ -14,6 +14,7 @@
 [![Hugging Face](https://img.shields.io/badge/Paper-on%20HF-white?logo=huggingface&logoColor=yellow)](https://huggingface.co/papers/2505.20416)
 
 [![Hugging Face](https://img.shields.io/badge/Demo-on%20HF-blue?logo=huggingface&logoColor=yellow)](https://huggingface.co/spaces/chenzihong/GraphGen)
+[![Model Scope](https://img.shields.io/badge/%F0%9F%A4%96%20Demo-on%20MS-green)](https://modelscope.cn/studios/chenzihong/GraphGen)
 [![OpenXLab](https://img.shields.io/badge/Demo-on%20OpenXLab-blue?logo=openxlab&logoColor=yellow)](https://g-app-center-120612-6433-jpdvmvp.openxlab.space)