Update README.md

README.md

@@ -33,7 +33,8 @@ Disclaimer: Examples contributed by the community and partners do not represent
 | [function_calling.ipynb](https://github.com/mistralai/cookbook/blob/main/function_calling.ipynb) | function calling | Use Mistral API for function calling |
 | [evaluation.ipynb](https://github.com/mistralai/cookbook/blob/main/evaluation.ipynb) | evaluation | Evaluate models with Mistral API |
 | [mistral_finetune_api.ipynb](https://github.com/mistralai/cookbook/blob/main/mistral_finetune_api.ipynb) | fine-tuning | Finetune a model with Mistral fine-tuning API |
-| [mistral-search-engine.ipynb](https://github.com/mistralai/cookbook/blob/main/mistral-search-engine.ipynb) | RAG, function calling | Search engine built with Mistral API, function calling and RAG 
+| [mistral-search-engine.ipynb](https://github.com/mistralai/cookbook/blob/main/mistral-search-engine.ipynb) | RAG, function calling | Search engine built with Mistral API, function calling and RAG |
+| [prefix_use_cases.ipynb](https://github.com/mistralai/cookbook/blob/main/prefix_use_cases.ipynb) | prefix, prompting| Cool examples with Mistral's prefix feature |
 
 ## Third Party Tools