Update app.py

app.py

@@ -2,7 +2,7 @@ from langchain_community.document_loaders import PyPDFLoader
 import gradio as gr
 from langchain.chains.summarize import load_summarize_chain
 from huggingface_hub import InferenceClient
-from langchain.llms import HuggingFaceHub
+from langchain_community.llms import HuggingFaceHub
 import os
 # Set your Hugging Face token securely
 os.environ["HUGGINGFACEHUB_API_TOKEN"] = ""