Update app.py

app.py

@@ -5,7 +5,7 @@ from langchain_community.chat_message_histories import ChatMessageHistory
 from pypdf import PdfReader
 import os
 import gradio as gr
-from openai import AzureOpenAI
+from langchain_openai import AzureOpenAI
 
 client = AzureOpenAI(
             api_key=os.getenv("API"),