Update app.py

app.py

@@ -3,7 +3,7 @@ from langchain_community.llms import GooglePalm
 from langchain.text_splitter import CharacterTextSplitter
 from langchain_community.embeddings import GooglePalmEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain_community.chains import RetrievalQA
+from langchain.chains import RetrievalQA
 from secret1 import GOOGLE_API as google_api
 import PyPDF2
 # def chatbot_response(user_input, history):