ISTWCMS-5999: refactor groups so commas aren't preceded with a space

src/patterns/04-components/card/card-elements/_groups.twig

@@ -8,13 +8,7 @@
 
     {% block details_content %}
       <div class="card__groups-list">
-        {% for group in groups %}
-          {% if loop.index0 > 0 %}
-            , {{ group.title }}
-          {% else %}
-            {{ group.title }}
-          {% endif %}
-        {% endfor %}
+        {{ groups|map(g => g.title)|join(', ') }}
       </div>
     {% endblock %}
   {% endembed %}