Fix button distance in the issue weight discovery

ee/app/views/shared/promotions/_promote_issue_weights.html.haml

@@ -30,4 +30,4 @@
               = _('Improve issues management with Issue weight and GitLab Enterprise Edition.')
           %div
             = render 'shared/promotions/promotion_link_project', short_form: true, target_blank: true
-            = link_to s_("Promotions|Don't show me this again"), '#', class: ['btn', 'js-close', 'js-close-callout']
+            = link_to s_("Promotions|Don't show me this again"), '#', class: ['btn', 'js-close', 'js-close-callout', 'gl-mt-3']