Translate label admin user dropdown

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

@@ -61,7 +61,7 @@
         = sprite_icon('search', css_class: 'search-icon')
         = button_tag s_('AdminUsers|Search users') if Rails.env.test?
       .dropdown.gl-sm-ml-3
-        = label_tag 'Sort by'
+        = label_tag s_('AdminUsers|Sort by')
         = gl_redirect_listbox_tag admin_users_sort_options(filter: params[:filter], search_query: params[:search_query]), @sort, data: { right: true }
 
 #js-admin-users-app{ data: admin_users_data_attributes(@users) }

locale/gitlab.pot

@@ -2937,6 +2937,9 @@ msgstr ""
 msgid "AdminUsers|Send email to users"
 msgstr ""
 
+msgid "AdminUsers|Sort by"
+msgstr ""
+
 msgid "AdminUsers|The user can't access git repositories."
 msgstr ""