doc: update paper link

README.md

@@ -18,7 +18,7 @@ app_port: 7860
   <a href="https://www.sjtu.edu.cn/">SII-GAIR</a> &nbsp;&amp;&nbsp; <a href="https://sand.ai">Sand.ai</a>
 </p>
 
-[![Paper](https://img.shields.io/badge/Paper-PDF-red)](https://github.com/GAIR-NLP/daVinci-MagiHuman/blob/main/assets/daVinci_MagiHuman.pdf)
+[![Paper](https://img.shields.io/badge/Paper-PDF-red)](https://arxiv.org/abs/2603.21986)
 [![Demo](https://img.shields.io/badge/%F0%9F%A4%97%20Demo-HuggingFace-orange)](https://huggingface.co/spaces/SII-GAIR/daVinci-MagiHuman)
 [![Models](https://img.shields.io/badge/%F0%9F%A4%97%20Models-HuggingFace-yellow)](https://huggingface.co/GAIR-NLP/daVinci-MagiHuman)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)