Updated depreciated imports.

app.py

@@ -1,11 +1,11 @@
 import gradio as gr
 from langchain.prompts import ChatPromptTemplate
-from langchain_community.llms import HuggingFaceHub
+from langchain_huggingface import HuggingFaceEndpoint
 from langchain.schema import HumanMessage, SystemMessage
 import os
 
 # Set up the LangChain model (using the same Zephyr model)
-llm = HuggingFaceHub(
+llm = HuggingFaceEndpoint(
     repo_id="HuggingFaceH4/zephyr-7b-beta",
     model_kwargs={"temperature": 0.7, "max_length": 512}
 )