staging/publishing: Set go1.16 version to go1.16.9

[cpanato]

What type of PR is this?

/kind cleanup
/area dependency security

What this PR does / why we need it:

staging/publishing: Set go1.16 version to go1.16.9
Part of kubernetes/release#2254

/assign @nikhita @dims @justaugustus
cc: @kubernetes/release-engineering

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

@cpanato: This issue is currently awaiting triage.

If a SIG or subproject determines this is a relevant issue, they will accept it by applying the triage/accepted label and provide further guidance.

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[dims]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

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• staging/publishing/OWNERS [dims]

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[cpanato]

/test pull-kubernetes-node-e2e-containerd