Update app.py

app.py

@@ -4,8 +4,8 @@ import gradio as gr
 import nltk
 import sentence_transformers
 import torch
-from duckduckgo_search import ddg
-from duckduckgo_search.utils import SESSION
+from duckduckgo-search import ddg
+from duckduckgo-search.utils import SESSION
 from langchain.chains import RetrievalQA
 from langchain.document_loaders import UnstructuredFileLoader
 from langchain.embeddings import JinaEmbeddings