updating finetuned from model to CodeLlama-7B

Updating decription of finetuned from model from CodeLlama-70B to CodeLlama-7B

README.md

@@ -21,7 +21,7 @@ This is the model card of a 🤗 transformers model that has been pushed on the
 - **Developed by:** [Defog, Inc](https://defog.ai)
 - **Model type:** [Text to SQL]
 - **License:** [CC-by-SA-4.0]
-- **Finetuned from model:** [CodeLlama-70B]
+- **Finetuned from model:** [CodeLlama-7B]
 
 ### Model Sources [optional]
 - [**HuggingFace:**](https://huggingface.co/defog/sqlcoder-70b-alpha)