Update README.md

README.md

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 This is the model weight of **MUFFIN-T5-3B** (**Mu**lti-**F**aceted **In**structions).
 
-We fine-tune the [T5-3B](https://huggingface.co/t5-3b) model on our [MUFFIN dataset](arxiv.org/abs/2312.02436).
+We fine-tune the [T5-3B](https://huggingface.co/t5-3b) model on our [MUFFIN dataset](https://arxiv.org/abs/2312.02436).
 
 We released both 3B and 11B models:
 |Model|Number of parameters|