Replace group card label with Meldungen heading

patterns/vsf-list-detailseite.html

@@ -109,8 +109,8 @@
 
     <div class="sg-vsf-list-detail-page__content">
       <aside class="sg-vsf-list-detail-page__left-column" aria-label="Benachrichtigungen">
-        <p class="sg-preview-label">Component: Group Card</p>
         <div class="sg-group-card" data-component="group-card">
+          <h2 class="sg-heading-h2">Meldungen</h2>
           <article class="sg-card" data-component="notification-card" data-component-context="group-card">
             <div class="sg-card-segment sg-card-segment--header sg-card-segment--signal-red" data-component-part="card-header">
               <p class="sg-body">