Build Image: Bump atc0005/go-ci from go-ci-oldstable-build-v0.21.5 to go-ci-oldstable-build-v0.21.6 in /dependabot/docker/builds #560

Job	Run time
Dependency Updates / Assert PR branch is ahead	4s
Go Module Validation / Assert PR branch is ahead	4s
Lint / Assert PR branch is ahead	5s
Vulnerability / Assert PR branch is ahead	6s
Go Module Validation / Look for missing vendored dependencies	16s
Go Module Validation / Look for missing go.mod changes	18s
Dependency Updates / Look for available minor or patch releases	23s
Lint / Lint Markdown files	10s
Lint / Lint Dockerfiles	9s
Vulnerability / govulncheck	24s
	1m 59s

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