Update README.md

README.md

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 [![arXiv](https://img.shields.io/badge/arXiv-2502.12524-b31b1b.svg)](https://arxiv.org/abs/2502.12524) [![Hugging Face Demo](https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Spaces-blue)](https://huggingface.co/spaces/sunsmarterjieleaf/yolov12) 
 
 ## Updates
-- 2025/02/19: [arXiv version](https://arxiv.org/abs/2502.12524) is public.
+- 2025/02/19: [arXiv version](https://arxiv.org/abs/2502.12524) is public. [Demo](https://huggingface.co/spaces/sunsmarterjieleaf/yolov12) is available.
 
 
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