Update QnA.py

QnA.py

@@ -66,7 +66,7 @@ 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")
-    elif API.startswith('hf'):
+    elif API_KEY.startswith('hf'):
         chat_llm = get_hugging_face_model(API_key=API_KEY)
     
     # Create a retriever