Change deprecated usage of rendering without response body

app/controllers/admin/abuse_reports_controller.rb

app/controllers/admin/broadcast_messages_controller.rb

app/controllers/admin/keys_controller.rb

app/controllers/admin/spam_logs_controller.rb

app/controllers/admin/users_controller.rb

app/controllers/concerns/toggle_subscription_action.rb

app/controllers/dashboard/todos_controller.rb

app/controllers/groups/group_members_controller.rb

app/controllers/profiles/emails_controller.rb

app/controllers/profiles/keys_controller.rb

app/controllers/projects/milestones_controller.rb

app/controllers/projects/notes_controller.rb

app/controllers/projects/project_members_controller.rb

app/controllers/projects/protected_branches_controller.rb

spec/controllers/projects/raw_controller_spec.rb