Quarantine flaky dismissed vulnerabilities spec

qa/qa/specs/features/ee/browser_ui/10_govern/dismissed_vulnerabilities_in_security_widget_spec.rb

@@ -59,6 +59,10 @@ module QA
       end
       it 'checks that dismissed vulnerabilities do not show up', :blocking,
+        quarantine: {
+          issue: 'https://gitlab.com/gitlab-org/gitlab/-/issues/498195',
+          type: :investigating
+        },
         testcase: 'https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/415291' do
         Page::Project::Menu.perform(&:go_to_vulnerability_report)