update release job

[cpanato]

Summary

before the 0.5.0 release I did a rehearsal and found some updates to be made

rehearsal: https://github.com/cpanato/rekor/releases/tag/v9.99.9

$ docker run gcr.io/cpanato-general/rekor-server:v9.99.9 version
Unable to find image 'gcr.io/cpanato-general/rekor-server:v9.99.9' locally
v9.99.9: Pulling from cpanato-general/rekor-server
2df365faf0e3: Already exists
c6f4d1a13b69: Already exists
7e061386ba97: Already exists
250c06f7c38e: Already exists
b41daeca4c61: Pull complete
Digest: sha256:4d869ec63cbb4528b77848007dcd47e8e19b286a133e3143bb334550c41c7888
Status: Downloaded newer image for gcr.io/cpanato-general/rekor-server:v9.99.9
GitVersion:    v9.99.9
GitCommit:     af4e6c7b852140e88b14b252a5694f8d116cfbea
GitTreeState:  clean
BuildDate:     '2022-02-04T09:31:09Z'
GoVersion:     go1.17.6
Compiler:      gc
Platform:      linux/amd64

Ticket Link

n/a

Release Note

NONE