Update app.py

app.py

@@ -1,7 +1,7 @@
 import gradio as gr
 from langchain.document_loaders import OnlinePDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.embeddings import HuggingFaceEmbeddings
+from langchain.embeddings import HuggingFaceHubEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.llms import HuggingFaceHub
 from langchain.chains import RetrievalQA
@@ -23,7 +23,7 @@ def pdf_changes(pdf_doc):
         separators=['\n\n', '\n', '(?=>\. )', ' ', '']
     )
     docs  = text_splitter.split_documents(pages)
-    embeddings = HuggingFaceEmbeddings()
+    embeddings = HuggingFaceHubEmbeddings()
     db = FAISS.from_documents(docs, embeddings)
     
     llm=HuggingFaceHub(repo_id="google/flan-t5-xxl", model_kwargs={"temperature":1, "max_length":1000000})