Update README.md

README.md

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 - **Training**:
   - **Task**: [🤗datasets/locuslab/TOFU](https://huggingface.co/datasets/locuslab/TOFU)
   - **Method**: Fine tune
-- **Base Model**: [[🤗NousResearch/Llama-2-7b-chat-hf](https://huggingface.co/NousResearch/Llama-2-7b-chat-hf)
+- **Base Model**: [🤗NousResearch/Llama-2-7b-chat-hf](https://huggingface.co/NousResearch/Llama-2-7b-chat-hf)
 - **Code Base**: [github.com/OPTML-Group/Unlearn-Simple](https://github.com/OPTML-Group/Unlearn-Simple)
 - **Research Paper**: ["Simplicity Prevails: Rethinking Negative Preference Optimization for LLM Unlearning"](https://arxiv.org/abs/2410.07163)