Update app.py

app.py

@@ -6,6 +6,6 @@ from langchain_google_genai import GoogleGenerativeAI
 from langchain_core.prompts import ChatPromptTemplate,MessagesPlaceholder
 from langchain_core.output_parsers import StrOutputParser
 from langchain_community.chat_message_histories import SQLChatMessageHistory
-from langchain_core.runnables.history import RunnablesWithMessageHistory
+from langchain_core.runnables.history import RunnableWithMessageHistory
 
 st.write('hello welecome to data science tutor')