Internationalize Admin users new

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

app/views/admin/users/new.html.haml

 - page_title _("New User")
 %h3.page-title
-  New user
+  = s_('AdminUsers|New user')
 %hr
 = render 'form'

changelogs/unreleased/suzu-1990-gitlab-patch-112.yml

+---
+title: Internationalize Admin users new
+merge_request: 41367
+author: Takuya Noguchi
+type: other