Per the maintainer decision (option a: ingress.clusterIssuer strictly
required in ALL charts) the two remaining defaults are removed as well:
- cyberchef: drop the letsencrypt default; bump raised from minor to
major (6.0.0+up11.4.0) as this is a breaking values change.
- urlaubsverwaltung: drop the letsencrypt-issuer default; major bump
to 6.0.0+up6.7.0.
- CI test-values for both charts now set clusterIssuer explicitly.
A repo-wide grep confirms no chart carries a clusterIssuer default
anymore.