Quarantine flaky test

qa/qa/specs/features/ee/browser_ui/secure/security_reports_spec.rb

@@ -109,7 +109,7 @@ module QA
           end
         end
 
-        it 'displays security reports in the group security dashboard', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1280' do
+        it 'displays security reports in the group security dashboard', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1280', quarantine: { issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/238848', type: :flaky } do
           Page::Main::Menu.perform(&:go_to_groups)
           Page::Dashboard::Groups.perform do |groups|
             groups.click_group @project.group.path