Update README.md

README.md

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 # <b>MgGPT</b>
 
-MgGPT is a fully fine-tuned generative text model collection based on LlaMA2, particularly in the
-Arabic language domain. This is the repository for the version 1.5 of 13B pre-trained model.
+MgGPT-13B is a fully fine-tuned generative text model collection based on LlaMA2, particularly in the
+Arabic language domain. This is the repository for the version of 13B pre-trained model.
 
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 ## Model Details