community/k3s: upgrade to 1.21.0.1

Ref https://github.com/k3s-io/k3s/releases/tag/v1.21.0%2Bk3s1
7 jobs for !20894 with k3s in 3 minutes and 34 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
passed #380594
docker-alpine x86_64
lint

00:00:19

 
  Build
passed #380599
docker-alpine ci-build aarch64
build-aarch64

00:02:28

passed #380600
docker-alpine ci-build armv7
build-armv7

00:03:14

passed #380598
docker-alpine ci-build ppc64le
build-ppc64le

00:03:14

passed #380597
docker-alpine ci-build s390x
build-s390x

00:02:36

passed #380596
docker-alpine ci-build x86
build-x86

00:01:45

passed #380595
docker-alpine ci-build x86_64
build-x86_64

00:01:18