Update app.py

app.py

@@ -6,7 +6,7 @@ import pathlib
 import streamlit as st
 from streamlit_option_menu import option_menu
 from tabs import (tab0_welcome, tab1_inputs, tab2_constraints,
-                  tab3_coefficients, tab4_optimization, tab5_sensitivity,
+                  tab3_coefficients, tab4_optimisation, tab5_sensitivity,
                   tab6_scenarios)
 from utils.data_utils import load_slider_data, strip_unit_suffix
 from config.config import method_order, secondary_resources, hidden_resource_names