Update README.md

The model is truly impressive! We would like to contribute to modifying the base_model information in the README of this model. This is to help address the missing details in the model card.

README.md

@@ -10,6 +10,8 @@ datasets:
 - p208p2002/wudao
 widget:
 - text: <s> 4 + 3 =
+base_model:
+- meta-llama/Llama-2-7b
 ---
 ## MiniMA-2-1B