Update app.py

app.py

@@ -154,7 +154,7 @@ with prompt_placeholder:
 credit_card_placeholder.caption(f"""
 Used {st.session_state.token_count} tokens \n
 Debug Langchain conversation: 
-{st.session_state.conversation.memory.buffer}
+{st.session_state.chain.memory.buffer}
 """)
 
 components.html("""