Update QnA.py

QnA.py

@@ -67,7 +67,7 @@ def get_hugging_face_model(model_id='mistralai/Mistral-7B-Instruct-v0.2',tempera
 def Q_A(vectorstore,question,API_KEY):
     if API_KEY.startswith('gsk'):
         os.environ["GROQ_API_KEY"] = API_KEY
-        chat_llm = ChatGroq(model="llama3-8b-8192")
+        chat_llm = ChatGroq(model="gemma2-9b-it") #(model="llama3-8b-8192")
     elif API_KEY.startswith('hf'):
         chat_llm = get_hugging_face_model(api_key=API_KEY)