Kubernetes 1.21.12, 1.22.9, 1.23.6 delay

[Verónica López]

Hi,

This email is to notify the delay of Kubernetes 1.21.12,  1.22.9, and 1.23.6 releases.

We worked hard to make the releases available before the Easter break, however, with the release schedule of Go 1.18.1, and the current limited amount of hands in the Release Team, we decided to postpone the release date until Tuesday April 19th.

If you have any questions or concerns, please reach out to us in #sig-release on Slack.

Thanks for understanding,

Verónica López, Release Manager

On behalf of the Release Team.