Update app.py

app.py

@@ -106,8 +106,8 @@ Question: {query}
     Generated_chat = LLMChain(llm=llama3, prompt=prompt)
     response = Generated_chat.invoke({'retrieved_documents': retrieved_documents, 'query': query})
     
-    # Append the query and the response to history as a tuple
-    history.append((query, response['text']))
+    # Append the query and the response to history as a list of length 2
+    history.append([query, response['text']])
     return response['text'], history
 
 def gradio_app():