Update app.py

app.py

@@ -1,9 +1,9 @@
 from langchain.chains import ConversationalRetrievalChain
 from langchain.memory import ConversationBufferMemory
-from langchain.chat_models import ChatOpenAI
 from langsmith import traceable
-from langchain.embeddings.openai import OpenAIEmbeddings
-from langchain.vectorstores import Chroma
+from langchain_community.chat_models import ChatOpenAI
+from langchain_community.embeddings import OpenAIEmbeddings
+from langchain_community.vectorstores import Chroma
 from langchain.prompts import ChatPromptTemplate
 from langchain.prompts.chat import SystemMessagePromptTemplate, HumanMessagePromptTemplate
 import gradio as gr