Update ArXiv link in README.md

Author: jiazhou-garland

README.md

@@ -2,7 +2,7 @@
   <img src="./images/Page.png" width="100%">
 
   [![Project Page](https://img.shields.io/badge/Project-Page-blue.svg)](https://idea-research.github.io/V-Reflection/)
-  [![Paper](https://img.shields.io/badge/ArXiv-Paper-brown.svg?logo=arxiv)](.)
+  [![Paper](https://img.shields.io/badge/ArXiv-Paper-brown.svg?logo=arxiv)](https://arxiv.org/abs/2604.03307)
   [![Model Weights](https://img.shields.io/badge/Model-HuggingFace-blue.svg?logo=huggingface)](https://huggingface.co/garlandchou/V-Reflection)
   [![Code](https://img.shields.io/badge/Code-GitHub-blue.svg?logo=github)](https://github.com/IDEA-Research/V-Reflection)
 </p>