fix(patterns): use white CTA title text

styles/45-patterns-public-page-patterns.css

@@ -30,9 +30,15 @@
 }
 
 .sg-public-page-pattern-call-to-action-box--full-width {
+  --text-public-page-pattern-call-to-action-full-width-title: var(--color-font-light);
   width: 100%;
 }
 
+.sg-public-page-pattern-call-to-action-box--full-width
+> .sg-card-segment--signal-yellow {
+  color: var(--text-public-page-pattern-call-to-action-full-width-title);
+}
+
 .sg-public-page-pattern-call-to-action-box__action {
   display: flex;
 }