Update README with v2 mention (#22)

- Update README with v2 mention (0b9557c207cb1237d6680d0e00bc715136659547)

README.md

@@ -15,6 +15,15 @@ linguistic communities to communicate effortlessly through speech and text.
 
 This repository hosts 🤗 Hugging Face's [implementation](https://huggingface.co/docs/transformers/main/en/model_doc/seamless_m4t) of SeamlessM4T. You can find the original weights, as well as a guide on how to run them in the original hub repositories ([large](https://huggingface.co/facebook/seamless-m4t-large) and [medium](https://huggingface.co/facebook/seamless-m4t-medium) checkpoints).
 
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+**🌟 SeamlessM4T v2, an improved version of this version with a novel architecture, has been released [here](https://huggingface.co/facebook/seamless-m4t-v2-large). 
+This new model improves over SeamlessM4T v1 in quality as well as inference speed in speech generation tasks.**
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+**SeamlessM4T v2 is also supported by 🤗 Transformers, more on it [in the model card of this new version](https://huggingface.co/facebook/seamless-m4t-v2-large#transformers-usage) or directly in [🤗 Transformers docs](https://huggingface.co/docs/transformers/main/en/model_doc/seamless_m4t_v2).**
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 SeamlessM4T Medium covers:
 - 📥 101 languages for speech input
 - ⌨️ [196 Languages](https://huggingface.co/ylacombe/hf-seamless-m4t-medium/blob/main/tokenizer_config.json#L1887-L2089) for text input/output