Update README.md

Hi there! I just wanted to say that your model is fantastic. We would love to contribute by updating the README to include the base_model information. This is to help fill in the missing details in the model card. Thank you for your great work!

README.md

@@ -7,6 +7,8 @@ datasets:
 language:
 - en
 pipeline_tag: text-generation
+base_model:
+- meta-llama/Llama-2-70b-hf
 ---
 # Stable Beluga 2