Merge branch '28559-remove-active-underline' into 'master'

don't underline clicked links in Notes header

Closes #28559

See merge request !9753

app/assets/stylesheets/pages/notes.scss

@@ -331,6 +331,10 @@ ul.notes {
 
     &:hover {
       color: $gl-link-color;
+    }
+
+    &:focus,
+    &:hover {
       text-decoration: none;
     }
   }