Correct text of Banner message label

Changelog: changed
EE: true

ee/app/assets/javascripts/maintenance_mode_settings/components/app.vue

@@ -15,6 +15,7 @@ export default {
       'GitLab is undergoing maintenance and is operating in read-only mode.',
     ),
     buttonText: __('Save changes'),
+    bannerLabel: __('Banner message'),
   },
   components: {
     GlForm,
@@ -53,7 +54,7 @@ export default {
           </p>
         </div>
       </div>
-      <gl-form-group label="Banner Message" label-for="maintenanceBannerMessage">
+      <gl-form-group :label="$options.i18n.bannerLabel" label-for="maintenanceBannerMessage">
         <gl-form-textarea
           id="maintenanceBannerMessage"
           v-model="bannerMessage"

locale/gitlab.pot

@@ -5458,6 +5458,9 @@ msgstr ""
 msgid "BambooService|The user with API access to the Bamboo server."
 msgstr ""
 
+msgid "Banner message"
+msgstr ""
+
 msgid "Based on"
 msgstr ""