[Site] Fix deprecated function call

Author: chalasr

ux.symfony.com/templates/ux_packages/map.html.twig

@@ -34,7 +34,7 @@
 {% block demo_content %}
     <div>
         {# The map must have a defined height #}
-        {{ render_map(map, {style: 'height: 600px;'}) }}
+        {{ ux_map(map, {style: 'height: 600px;'}) }}
     </div>
 {% endblock %}