Add second group card variant with h2 heading

components/cards.html

@@ -166,6 +166,37 @@
       </article>
 
     </div>
+
+    <p class="sg-preview-label">Variante: Group Card mit H2 Überschrift</p>
+
+    <div class="sg-group-card" data-component="group-card">
+      <h2>Gruppenüberschrift</h2>
+
+      <article class="sg-card" data-component="card" data-component-context="group-card">
+        <div class="sg-card-segment sg-card-segment--header sg-card-segment--darkblue" data-component-part="card-header">
+          <div class="sg-strong">Card in Group</div>
+        </div>
+
+        <div class="sg-card-segment sg-card-segment--body" data-component-part="card-body">
+          <p class="sg-body">
+            Group Cards bündeln mehrere zusammengehörige Cards.
+          </p>
+        </div>
+      </article>
+
+      <article class="sg-card" data-component="card" data-component-context="group-card">
+        <div class="sg-card-segment sg-card-segment--header sg-card-segment--darkgreen" data-component-part="card-header">
+          <div class="sg-strong">Weitere Card</div>
+        </div>
+
+        <div class="sg-card-segment sg-card-segment--body" data-component-part="card-body">
+          <p class="sg-body">
+            Die Group Card enthält hier zusätzlich eine H2-Überschrift.
+          </p>
+        </div>
+      </article>
+
+    </div>
   </section>
 
   <!-- Component: Multisegment Card -->