Update app.py

app.py

@@ -67,7 +67,7 @@ def get_conversation_chain(vectorstore, model_name):
     memory = ConversationBufferMemory(memory_key='chat_history', return_messages=True)
     
     conversation_chain = ConversationalRetrievalChain.from_llm(llm=llm,
-                                                               condense_question_prompt=CONDENSE_QUESTION_PROMPT
+                                                               condense_question_prompt=CONDENSE_QUESTION_PROMPT,
                                                                retriever=vectorstore.as_retriever(),
                                                                memory=memory
                                                               )