Vehicles page refactor

Author: Fernando-A-Rocha

web/src/pages/reference/ID_Lists/Vehicles.astro

@@ -321,7 +321,9 @@ const vehicles = {
             {
                 Object.entries(subcategories).map(([subcategory, vehiclesList]) => (
                     <div class="vehicle-subcategory" id={subcategory}>
-                        <h4 class="vehicle-subcategory-title">{subcategory === 'Uncategorized' ? '' : subcategory}</h4>
+                        {subcategory !== 'Uncategorized' && (
+                            <h4 class="vehicle-subcategory-title">{subcategory}</h4>
+                        )}
                         <div class="vehicle-list">
                         {vehiclesList.map(vehicle => (
                             <div class="vehicle-item" id={vehicle.name}>