Update QnA.py

QnA.py

@@ -56,9 +56,9 @@ def summarize(documents,llm):
     return results['output_text']
 
 
-def get_hugging_face_model(model_id='mistralai/Mixtral-8x7B-Instruct-v0.1',temperature=0.01,max_tokens=4096,api_key=None):
+def get_hugging_face_model(model_id='mistralai/Mistral-7B-Instruct-v0.2',temperature=0.01,max_tokens=4096,api_key=None):
     llm = HuggingFaceHub(
-        huggingfacehub_api_token =api_key ,
+        huggingfacehub_api_token =api_key,
         repo_id=model_id, 
         model_kwargs={"temperature":temperature, "max_new_tokens":max_tokens}
         )