fix(contact): use wp_kses_post for block wrapper and AA color for required marker

- contact-info.php was calling esc_attr() on the output of
  blockWrapperAttributes(), which returns a full attribute string.
  esc_attr() turned the wrapping quotes into " so the class
  attribute rendered literally as class="contact-info ...".
  Switched to wp_kses_post() to match the pattern used by every
  other block template in the project.
- contact-info.css: .gfield_required used --color-cwc-orange-01
  (#e15747, 3.71:1 on white) which fails WCAG 2 AA. Swapped to the
  project's --color-secondary-accessible token (#c43c2b) so the
  required marker is brand-aligned and meets the 4.5:1 minimum.
- Regenerated static/dist/theme.css to match.

views/blocks/contact-info/contact-info.css

@@ -131,7 +131,7 @@ a.contact-info__value:hover {
 }
 
 .contact-info__form .gfield_required {
-    color: var(--color-cwc-orange-01);
+    color: var(--color-secondary-accessible);
     font-weight: 700;
     margin-left: 0.25rem;
 }