Wrap object cards in group card with Unternehmen heading

patterns/vsf-list-detailseite.html

@@ -147,6 +147,8 @@
       </aside>
 
       <div class="sg-vsf-list-detail-page__right-column" aria-label="Objektkarten">
+        <div class="sg-group-card" data-component="group-card">
+          <h2 class="sg-heading-h2 sg-text-on-dark sg-group-card__heading">Unternehmen</h2>
           <div class="sg-object-card-grid" aria-label="Pattern – Object Card Liste">
           <article class="sg-card sg-object-card" data-pattern="object-card" aria-label="Objekt Card">
             <header class="sg-card-segment sg-card-segment--header sg-card-segment--darkblue sg-object-card__header" data-pattern-part="object-card-header">
@@ -239,6 +241,7 @@
           </div>
         </div>
       </div>
+    </div>
   </section>
 
   <script src="../scripts/help-icon-overlays.js"></script>