Update api_change.md delete update-swagger-spec.sh

[Abirdcfly]

hack/update-swagger-spec.sh has delete in kubernetes/kubernetes#72924

Which issue(s) this PR fixes:

Fixes #

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-triage-robot]

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues and PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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/lifecycle rotten

[k8s-ci-robot]

@Abirdcfly: PR needs rebase.

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[cblecker]

Closing as no longer required.

Thanks anyways!

/close

[k8s-ci-robot]

@cblecker: Closed this PR.

In response to this:

Closing as no longer required.

Thanks anyways!

/close

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