Merge pull request #9006 from hebbet/patch-1

Change comment in blue ui to match other scss

app/assets/stylesheets/themes/ui_blue.scss

 /**
- * Modern GitLab UI theme
+ * Blue GitLab UI theme
  */
 .ui_blue {
   @include dark-theme(#BECDE9, #2980b9, #1970a9, #096099);