Update app.py

app.py

@@ -4,7 +4,7 @@ import openai
 import pinecone
 import os
 from langchain.vectorstores import Pinecone
-from langchain_openai import OpenAIEmbeddings
+from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain.chains import ConversationalRetrievalChain
 from langchain.chat_models import ChatOpenAI
 import datetime