Add card dev tag

Author: jhellingsdata

index.html

@@ -70,7 +70,9 @@ <h3 class="card-title">Tax Explorer</h3>
                 <!-- <div class="card-chart" id="chart7"></div> -->
                 <img src="data-story/chart-tax-rates.png" alt="" style="width: 100%">
                 <span class="card-date">September 2025</span>
-                <p class="card-text">Visualise your marginal tax rates.
+                <p class="card-text">
+                    Visualise your marginal tax rates.
+                    <span class="construction-text">Under development</span>
                 </p>
             </div>
             <div class="card" onclick="location.href='uk.html';">