[UX] tab0_welcome.py: British spelling (optimize -> optimise, optimization -> optimisation)

tabs/tab0_welcome.py

@@ -13,14 +13,14 @@ def render_tab():
 
     st.markdown("""
     <div class='custom-corps'>
-    This tool helps project teams working on a CRRA and the CDR-curious explore how to optimize carbon dioxide removal portfolios by adjusting resource usage and constraints.
+    This tool helps project teams working on a CRRA and the CDR-curious explore how to optimise carbon dioxide removal portfolios by adjusting resource usage and constraints.
     </div>
     <br>
     """, unsafe_allow_html=True)
 
     st.warning("""
     While the tool offers multiple customization parameters and allows you to iterate on the results, it can never capture the full nuance and specificity of the resources and their availability in every single country.\n
-    The results of the optimization tool must therefore not be considered as final or complete. Users should use the results as a basis and refine the final CDR portfolios manually to account for the information/context not captured in the model.
+    The results of the optimisation tool must therefore not be considered as final or complete. Users should use the results as a basis and refine the final CDR portfolios manually to account for the information/context not captured in the model.
     """,
     icon=":material/warning:",
     title="Disclaimer")
@@ -40,13 +40,13 @@ def render_tab():
 
     <h3 class="wt wt-3">Outputs:</h3>
     <ol start="4">
-        <li><b>Portfolio generation</b>: run the optimization to find the best portfolio: how much CO₂ is removed, what methods are used, and in what proportions.</li>
+        <li><b>Portfolio generation</b>: run the optimisation to find the best portfolio: how much CO₂ is removed, what methods are used, and in what proportions.</li>
     </ol>
 
     <h3 class="wt wt-4">Explore:</h3>
     <ol start="5">
         <li><b>Sensitivity analysis</b>: analyze how changes in method caps or resource availability affect the portfolio.</li>
-        <li><b>Scenario comparison</b>: compare different scenarios based on the optimization results.</li>
+        <li><b>Scenario comparison</b>: compare different scenarios based on the optimisation results.</li>
     </ol>
 
     <p class="wt-cta"><span class="crra-hl">Let’s get started!</span> Use the side tabs to navigate through the sections.</p>