feat(patterns): add CTA title segment

patterns/public-page-patterns.html

@@ -340,6 +340,10 @@
       <div class="sg-preview-area">
         <div class="sg-content-group-box" data-component="content-group-box">
           <article class="sg-card sg-card--content-card sg-public-page-pattern-call-to-action-box sg-public-page-pattern-call-to-action-box--light sg-public-page-pattern-call-to-action-box--full-width" data-pattern="call-to-action-full-width" aria-label="Call to action full width">
+            <div class="sg-card-segment sg-card-segment--header sg-card-segment--darkblue" data-component-part="card-header">
+              <div class="sg-strong">Titel</div>
+            </div>
+            <!-- Optionales Meldungssegment: bei Bedarf ein-/ausblenden. -->
             <div class="sg-card-segment sg-card-segment--header sg-card-segment--signal-yellow" data-component-part="card-header">
               <div class="sg-strong">Hinweistext als Platzhalter</div>
             </div>