Update README.md

Author: shenyunhang

README.md

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-<font size=7><div align='center' > :grapes: \[[Read our arXiv Paper](https://arxiv.org/abs/2312.02153)\] &nbsp; :apple: \[[Try our Demo](https://huggingface.co/spaces/shenyunhang/APE)\] </div></font>
+<font size=7><div align='center' > :grapes: \[[Read our arXiv Paper](https://arxiv.org/abs/2312.02153)\] &nbsp; :apple: \[[Try our Demo (CPU version)](https://huggingface.co/spaces/shenyunhang/APE)\] </div></font>
 
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