Update src/app.py

src/app.py

@@ -6,6 +6,8 @@ demo, chat_history, show_img, txt, submit_button, uploaded_pdf = create_demo()
 
 # Create PDFChatBot instance
 pdf_chatbot = PDFChatBot()
+pdf_chatbot.load_model()
+pdf_chatbot.load_tokenizer()
 
 # Set up event handlers
 with demo: