Release 1.23 initial snapshot

Release 1.22 final snapshot

Release 1.22 initial snapshot

Release 1.21 final snapshot

Merge pull request kubernetes#27233 from divya-mohan0209/patch-2

Create 2021-04-08-kubernetes-release-1.21.md

Release 1.21 initial snapshot

Release 1.20 final snapshot

Release 1.20 initial snapshot

Release 1.19 final snapshot

Release 1.19 initial snapshot