Adds Arxiv link.

app.py

@@ -67,6 +67,7 @@ def parse_segmentation(input_image, input_text):
 INTRO_TEXT = """## PaliGemma 2 demo\n\n
 | [Github](https://github.com/google-research/big_vision/blob/main/big_vision/configs/proj/paligemma/README.md) 
 | [Blogpost](https://huggingface.co/blog/paligemma2) 
+| [Arxiv](https://arxiv.org/abs/2412.03555) 
 |\n\n
 PaliGemma 2 is an open vision-language model by Google, inspired by [PaLI-3](https://arxiv.org/abs/2310.09199) and 
 built with open components such as the [SigLIP](https://arxiv.org/abs/2303.15343)