update ko command

[cpanato]

What type of PR is this?

/kind bug

using the --bare flag we need to set the KO_DOCKER_REPO for the full name
also update ko to the latest release

run this on my gcp account and now everything works, sorry was my mistake

/assign @saschagrunert @puerco

What this PR does / why we need it:

Which issue(s) this PR fixes:

None

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

[cpanato]

/test pull-bom-verify

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, saschagrunert

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[cpanato]

all good now

$ docker run gcr.io/k8s-staging-bom/bom:29b3f07 version
Unable to find image 'gcr.io/k8s-staging-bom/bom:29b3f07' locally
29b3f07: Pulling from k8s-staging-bom/bom
dbcab61d5a5a: Already exists
250c06f7c38e: Already exists
c4095b4ca642: Pull complete
Digest: sha256:990fb5135cac1d095e1cc5c521390fff213def3cca89f41269d58d8af2b576a7
Status: Downloaded newer image for gcr.io/k8s-staging-bom/bom:29b3f07
  ____     ___    __  __
 | __ )   / _ \  |  \/  |
 |  _ \  | | | | | |\/| |
 | |_) | | |_| | | |  | |
 |____/   \___/  |_|  |_|
bom: A tool for working with SPDX manifests

GitVersion:    v0.2.2-31-g29b3f07
GitCommit:     29b3f07
GitTreeState:  clean
BuildDate:     2022-03-02T12:51:14Z
GoVersion:     go1.17rc2
Compiler:      gc
Platform:      linux/arm64