Migrate checkout step summary buttons away from legacy buttons

ee/app/assets/javascripts/subscriptions/new/components/checkout/step_summary.vue

 <script>
-import { GlDeprecatedButton } from '@gitlab/ui';
+import { GlButton } from '@gitlab/ui';
 import { s__ } from '~/locale';
 
 export default {
   components: {
-    GlDeprecatedButton,
+    GlButton,
   },
   props: {
     isEditable: {
@@ -27,7 +27,7 @@ export default {
       <slot></slot>
     </div>
     <div v-if="isEditable" class="d-flex flex-column justify-content-center">
-      <gl-deprecated-button @click="edit">{{ $options.i18n.edit }}</gl-deprecated-button>
+      <gl-button @click="edit">{{ $options.i18n.edit }}</gl-button>
     </div>
   </div>
 </template>

ee/changelogs/unreleased/eread-migrate-checkout-step-summary-button.yml

+---
+title: Migrate checkout step summary buttons away from legacy buttons
+merge_request: 39561
+author:
+type: other