Update app.py

app.py

@@ -10,7 +10,7 @@ from dotenv import load_dotenv
 from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder
 from langchain.chains import create_history_aware_retriever, create_retrieval_chain
 from langchain.chains.combine_documents import create_stuff_documents_chain
-from langchain.llms import HuggingFaceHub
+from langchain_community.llms import HuggingFaceHub
 from sentence_transformers import SentenceTransformer
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from nomic import embed