Internationalize Admin namespace plan

Co-authored-by: Takuya Noguchi <takninnovationresearch@gmail.com>
Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

ee/app/views/admin/_namespace_plan.html.haml

@@ -7,5 +7,5 @@
   .col-sm-10
     = f.fields_for :gitlab_subscription do |f|
       = f.select :hosted_plan_id, Plan.pluck(:title, :id),
-        { include_blank: 'No plan' },
+        { include_blank: _('No plan') },
         class: 'form-control', data: { qa_selector: 'plan_dropdown' }

ee/changelogs/unreleased/suzu-1990-gitlab-suzu-1990-master-patch-32774.yml

+---
+title: Internationalize Admin namespace plan
+merge_request: 41363
+author: Takuya Noguchi
+type: other

locale/gitlab.pot

@@ -16828,6 +16828,9 @@ msgstr ""
 msgid "No parent group"
 msgstr ""
 
+msgid "No plan"
+msgstr ""
+
 msgid "No pods available"
 msgstr ""