update arxiv link

README.md

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-[🤗 HF Demo](https://huggingface.co/spaces/BAAI/Emu2) | [Demo](https://emu.ssi.plus/) | [Project Page](https://baaivision.github.io/emu2/)
+# Emu2-Gen
+
+[Paper](https://arxiv.org/abs/2312.13286) | [🤗HF Demo](https://huggingface.co/spaces/BAAI/Emu2) | [Demo](https://emu.ssi.plus) | [Project Page](https://baaivision.github.io/emu2/) | [Github](https://github.com/baaivision/Emu)
+
 
 ## Model Weights