Update app.py

app.py

@@ -1,10 +1,9 @@
 import os
-from langchain.embeddings.openai import OpenAIEmbeddings
 from langchain_community.vectorstores import Chroma
 from langchain.chains import ConversationalRetrievalChain
-from langchain_community.chat_models import ChatOpenAI
 from langchain_community.document_loaders import PyPDFLoader
 import fitz
+from langchain_openai import OpenAIEmbeddings, ChatOpenAI
 from PIL import Image
 from gtts import gTTS
 import playsound