Update main.py

main.py

@@ -8,7 +8,7 @@ from requests import JSONDecodeError
 from langchain_community.embeddings import HuggingFaceBgeEmbeddings
 from langchain_community.vectorstores import SupabaseVectorStore
 from langchain_community.llms import HuggingFaceEndpoint
-from langchain_openai import ChatOpenAI
+from langchain_community.chat_models import ChatOpenAI
 
 from langchain.chains import ConversationalRetrievalChain
 from langchain.memory import ConversationBufferMemory