Update app.py

app.py

@@ -43,7 +43,7 @@ final_answer = FinalAnswerTool()
 model = HfApiModel(
 max_tokens=2096,
 temperature=0.5,
-model_id='bigcode/starcoder2-15B', # it is possible that this model may be overloaded
+model_id='mistralai/Mistral-7B-v0.1', # it is possible that this model may be overloaded
 custom_role_conversions=None,
 )