simplify arxiv link

src/app.py

@@ -23,7 +23,7 @@ TITLE = """
 1. Choose an example image or upload your own
 2. Use the Pen tool to draw a mask over the clothing area you want to extract
 
-[![arxiv badge](https://img.shields.io/badge/arXiv-Paper-b31b1b.svg?style=for-the-badge)](https://arxiv.org/abs/2412.08573)
+[arxiv:2412.08573](https://arxiv.org/abs/2412.08573)
 """
 
 DEVICE = torch.device("cuda" if torch.cuda.is_available() else "cpu")