Update app.py

app.py

@@ -8,7 +8,7 @@ for package in packages:
     subprocess.check_call(['pip', 'install', package])
 
 
-from langchain_community.memory import ConversationBufferMemory
+from langchain.memory import ConversationBufferMemory
 from langchain_community.chat_message_histories import StreamlitChatMessageHistory
 from langchain_groq import ChatGroq
 from langchain.chains import LLMChain