Update README.md

add licence so model can be added to the [Leaderboard](https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard)

README.md

@@ -1 +1,8 @@
-This is a model released from the preprint: *[SimPO: Simple Preference Optimization with a Reference-Free Reward](https://arxiv.org/abs/2405.14734)*  Please refer to our [repository](https://github.com/princeton-nlp/SimPO) for more details.
+---
+license: llama3
+pipeline_tag: text-generation
+library_name: transformers
+tags:
+- SimPO
+---
+This is a model released from the preprint: *[SimPO: Simple Preference Optimization with a Reference-Free Reward](https://arxiv.org/abs/2405.14734)*  Please refer to our [repository](https://github.com/princeton-nlp/SimPO) for more details.