I don't think we should have to update the year in the license for the generated files every year. The rest of the ecosystem does not do this either.

There seems to be a gap in the add-license-headers target which is causing this diff in the generated files.

Ya, we'd just add 2026 to new files.

No problem, I add this because I see that CI/CD can't pass the check

Turns out it was make generate that was causing the issue. I had misread the failure.

Generated files had YEAR in them, and the convention is to not add the YEAR in such files (see https://github.com/kubernetes/kubernetes). I've raised #307 to follow this convention so we don't see issues like this again. Thanks @kangclzjc for originally raising this.