Update app.py

app.py

@@ -5,7 +5,7 @@ from dotenv import load_dotenv
 from langchain.document_loaders import ArxivLoader, PyPDFLoader
 from langchain.text_splitter import TokenTextSplitter
 from langchain.vectorstores import Chroma
-from langchain.embeddings.huggingface_hub import HuggingFaceHubEmbeddings
+from langchain_community.embeddings import HuggingFaceHubEmbeddings
 from langchain.chains import RetrievalQA
 from langchain.chains.summarize import load_summarize_chain
 from langchain_groq import ChatGroq