Update README.md

Author: billl-jiang

README.md

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   <a href="https://huggingface.co/spaces/OpenMotionLab/MotionGPT">HuggingFace Demo</a> •
   <a href="#️-faq">FAQ</a> •
   <a href="#-citation">Citation
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-https://github.com/OpenMotionLab/MotionGPT/assets/120085716/a741e162-b2f4-4f65-af8e-aa19c4115a9e
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-https://github.com/OpenMotionLab/MotionGPT/assets/120085716/5b60aebc-ce80-42e8-8a4c-1f673e85b84e
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-<!-- <img src="https://cdn.discordapp.com/attachments/941582479117127680/1111543600879259749/20230526075532.png" width="350px"> -->
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+Teaser Video            |  Demo Video
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+<video src="https://github.com/OpenMotionLab/MotionGPT/assets/120085716/a741e162-b2f4-4f65-af8e-aa19c4115a9e" />  |  <video src="https://github.com/OpenMotionLab/MotionGPT/assets/120085716/5b60aebc-ce80-42e8-8a4c-1f673e85b84e" />
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 <!-- ### [MotionGPT: Human Motion as a Foreign Language](https://motion-gpt.github.io/) -->