Changelog.md: Update references to sigs.k8s.io/promo-tools

[justaugustus]

What this PR does / why we need it:

Changelog.md: Update references to sigs.k8s.io/promo-tools
Part of kubernetes-sigs/promo-tools#424.

Signed-off-by: Stephen Augustus [email protected]
cc: @kubernetes/release-engineering

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

@justaugustus: This issue is currently awaiting triage.

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

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[justaugustus]

/assign @justinsb @rikatz @strongjz

[cpanato]

/lgtm

[rikatz]

@justaugustus you here?? 👋

/approve
Thanks!!!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, justaugustus, rikatz

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