Change vertical margin of page titles to 16px

app/assets/stylesheets/framework/typography.scss

@@ -286,7 +286,7 @@ body {
 }
 
 .page-title {
-  margin-top: $gl-padding;
+  margin: #{2 * $grid-size} 0;
   line-height: 1.3;
   font-size: 1.25em;
   font-weight: $gl-font-weight-bold;

changelogs/unreleased/winh-page-title-margin.yml

+---
+title: Change vertical margin of page titles to 16px
+merge_request: 21888
+author:
+type: changed