Quarantine a 'Group SAML SSO Non Enforced SSO' test

Signed-off-by: Rémy Coutable <remy@rymai.me>

qa/qa/specs/features/ee/browser_ui/1_manage/group/group_saml_sso_spec.rb

@@ -21,7 +21,7 @@ module QA
       end
 
       context 'Non enforced SSO' do
-        it 'User logs in to group with SAML SSO' do
+        it 'User logs in to group with SAML SSO', quarantine: 'https://gitlab.com/gitlab-org/gitlab/issues/55242' do
           Page::Group::Menu.perform(&:go_to_saml_sso_group_settings)
 
           managed_group_url = EE::Page::Group::Settings::SamlSSO.perform do |saml_sso|