Update app.py

app.py

@@ -455,4 +455,4 @@ if uploaded_file:
                 st.session_state['chat_history'].append({"user": user_input, "bot": None})
                 answer = qa_pdf(file_path, user_input)
                 st.session_state['chat_history'][-1]["bot"] = answer
-                st.experimental_rerun()
+                st.rerun()