Add DOI Buttons

README-huggingface.md

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 # Hugging Face model card for OpenPeerLLM
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+[![DOI](https://img.shields.io/badge/DOI-10.57967%2Fhf%2F6469-blue.svg)](https://doi.org/10.57967/hf/6469)
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 language:
   - en

README.md

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 # OpenPeerLLM: A Decentralized Large Language Model
 
+[![DOI](https://img.shields.io/badge/DOI-10.57967%2Fhf%2F6469-blue.svg)](https://doi.org/10.57967/hf/6469)
+
 This project implements a decentralized Large Language Model (LLM) that utilizes DecentTorch, Huggingface Transformers, BOINC, and the decentralized-internet SDK. The model incorporates LonScript grammar for enhanced language understanding and leverages OpenPeer for decentralized training and inference.
 
 ## Author Information