Update label select vue gl button

MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/37986

app/assets/javascripts/vue_shared/components/sidebar/labels_select_vue/dropdown_title.vue

 <script>
 import { mapState, mapActions } from 'vuex';
-import { GlDeprecatedButton, GlLoadingIcon } from '@gitlab/ui';
+import { GlButton, GlLoadingIcon } from '@gitlab/ui';
 
 export default {
   components: {
-    GlDeprecatedButton,
+    GlButton,
     GlLoadingIcon,
   },
   props: {
@@ -27,12 +27,12 @@ export default {
     {{ __('Labels') }}
     <template v-if="allowLabelEdit">
       <gl-loading-icon v-show="labelsSelectInProgress" inline />
-      <gl-deprecated-button
+      <gl-button
         variant="link"
         class="pull-right js-sidebar-dropdown-toggle"
         data-qa-selector="labels_edit_button"
         @click="toggleDropdownContents"
-        >{{ __('Edit') }}</gl-deprecated-button
+        >{{ __('Edit') }}</gl-button
       >
     </template>
   </div>

changelogs/unreleased/219870-label-select-dropdown-title.yml

+---
+title: Update label select vue gl button
+merge_request: 37986
+author:
+type: changed

spec/frontend/vue_shared/components/sidebar/labels_select_vue/dropdown_title_spec.js

 import Vuex from 'vuex';
 import { shallowMount, createLocalVue } from '@vue/test-utils';
 
-import { GlDeprecatedButton, GlLoadingIcon } from '@gitlab/ui';
+import { GlButton, GlLoadingIcon } from '@gitlab/ui';
 import DropdownTitle from '~/vue_shared/components/sidebar/labels_select_vue/dropdown_title.vue';
 
 import labelsSelectModule from '~/vue_shared/components/sidebar/labels_select_vue/store';
@@ -42,7 +42,7 @@ describe('DropdownTitle', () => {
     });
 
     it('renders edit link', () => {
-      const editBtnEl = wrapper.find(GlDeprecatedButton);
+      const editBtnEl = wrapper.find(GlButton);
 
       expect(editBtnEl.exists()).toBe(true);
       expect(editBtnEl.text()).toBe('Edit');