Update arxiv link

README.md

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   <h1>
     🦄️ MOFA-Video: Controllable Image Animation via Generative Motion Field Adaptions in Frozen Image-to-Video Diffusion Model
   </h1>
-<a href=''><img src='https://img.shields.io/badge/ArXiv-PDF-red'></a> &nbsp; <a href='https://myniuuu.github.io/MOFA_Video'><img src='https://img.shields.io/badge/Project-Page-Green'></a> &nbsp; <a href='https://myniuuu.github.io/MOFA_Video'><img src='https://img.shields.io/badge/🤗 hugging_face-comming_soom-blue'></a>
+<a href='https://arxiv.org/abs/2405.20222'><img src='https://img.shields.io/badge/ArXiv-PDF-red'></a> &nbsp; <a href='https://myniuuu.github.io/MOFA_Video'><img src='https://img.shields.io/badge/Project-Page-Green'></a> &nbsp; <a href='https://myniuuu.github.io/MOFA_Video'><img src='https://img.shields.io/badge/🤗 hugging_face-comming_soom-blue'></a>
 <div>
     <a href='https://myniuuu.github.io/' target='_blank'>Muyao Niu</a> <sup>1,2</sup> &nbsp;
     <a href='https://vinthony.github.io/academic/' target='_blank'>Xiaodong Cun</a><sup>2,*</sup> &nbsp;