Update create Epic button

ee/app/assets/javascripts/epic/components/epic_create.vue

@@ -7,7 +7,7 @@ import {
   GlIcon,
   GlButton,
   GlTooltipDirective,
-  GlDeprecatedButton,
+  GlButton,
 } from '@gitlab/ui';
 
 import { __ } from '~/locale';
@@ -18,7 +18,7 @@ export default {
   components: {
     GlFormCheckbox,
     GlIcon,
-    GlDeprecatedButton,
+    GlButton,
     GlButton,
     GlForm,
     GlFormInput,
@@ -72,9 +72,13 @@ export default {
 
 <template>
   <div class="dropdown epic-create-dropdown">
-    <gl-deprecated-button variant="success" class="qa-new-epic-button" data-toggle="dropdown">
+    <gl-button
+        category="primary"
+        variant="success"
+        class="qa-new-epic-button"
+        data-toggle="dropdown">
       {{ __('New epic') }}
-    </gl-deprecated-button>
+    </gl-button>
 
     <div :class="{ 'dropdown-menu-right': alignRight }" class="dropdown-menu">
       <gl-form>