Use gitlab-ui util classes

app/assets/javascripts/releases/components/app_index.vue

@@ -64,7 +64,7 @@ export default {
 </script>
 <template>
   <div class="flex flex-column mt-2">
-    <div class="align-self-end mb-2">
+    <div class="gl-align-self-end gl-mb-3">
       <releases-sort class="gl-mr-2" @sort:changed="fetchReleases" />
 
       <gl-button

app/assets/stylesheets/utilities.scss

@@ -129,3 +129,7 @@
   content: '';
   display: flex;
 }
+
+.gl-align-self-end {
+  align-self: flex-end;
+}