Fix RSpec/EmptyLineAfterFinalLetItBe for ee/spec/features/admin

Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/325836

.rubocop_manual_todo.yml

@@ -442,7 +442,6 @@ RSpec/EmptyLineAfterFinalLetItBe:
     - ee/spec/controllers/registrations/groups_controller_spec.rb
     - ee/spec/controllers/registrations/projects_controller_spec.rb
     - ee/spec/controllers/subscriptions_controller_spec.rb
-    - ee/spec/features/admin/admin_show_new_user_signups_cap_alert_spec.rb
     - ee/spec/features/boards/group_boards/multiple_boards_spec.rb
     - ee/spec/features/ci_shared_runner_warnings_spec.rb
     - ee/spec/features/dashboards/todos_spec.rb

ee/spec/features/admin/admin_show_new_user_signups_cap_alert_spec.rb

@@ -4,6 +4,7 @@ require 'spec_helper'
 
 RSpec.describe 'displays new user signups cap alert', :js do
   let_it_be(:admin) { create(:admin) }
+
   let(:help_page_href) { help_page_path('user/admin_area/settings/sign_up_restrictions.md') }
   let(:expected_content) { 'Your instance has reached its user cap' }