Update README.md

README.md

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 This is an off-the-shelf roberta-large model finetuned on WANLI, the Worker-AI Collaborative NLI dataset ([Liu et al., 2022](https://arxiv.org/abs/2201.05955)). It outperforms the `roberta-large-mnli` model on seven out-of-domain test sets, including by 11% on HANS and 9% on Adversarial NLI.
 
 ### How to use
-```
+```python
 from transformers import RobertaTokenizer, RobertaForSequenceClassification
 
 model = RobertaForSequenceClassification.from_pretrained('alisawuffles/roberta-large-wanli')