fix sberbank ref

README.md

@@ -8,7 +8,7 @@ This is a first attempt at a Hindi language model trained with Google Research's
 
 **As of 2022 I recommend Google's MuRIL model trained on English, Hindi, and other major Indian languages, both in their script and latinized script**: https://huggingface.co/google/muril-base-cased and https://huggingface.co/google/muril-large-cased
 
-**For causal language models, I would suggest SberBank / mGPT, though this is a large model**
+**For causal language models, I would suggest https://huggingface.co/sberbank-ai/mGPT, though this is a large model**
 
 <a href="https://colab.research.google.com/drive/1R8TciRSM7BONJRBc9CBZbzOmz39FTLl_">Tokenization and training CoLab</a>