Updated the expired link for Configuration option

[utkarsh-singh1]

Description:
The Configuration option still had a broken link.

Proposed Solution:
Added this link as a replacement - https://github.com/sigstore/cosign/blob/main/USAGE.md#detailed-usage

Page to Update:
https://kubernetes.io/docs/tasks/administer-cluster/verify-signed-images/#verifying-image-signatures-with-admission-controller

fixes: #34854

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[Sea-n]

Confirmed.
/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 1601f770ee99449485111e3ed25c34d33c1b26c2

[kbhawkey]

Preview:
https://deploy-preview-34980--kubernetes-io-main-staging.netlify.app/docs/tasks/administer-cluster/verify-signed-images/#verifying-image-signatures-with-admission-controller

[kbhawkey]

Thanks @utkarsh-singh1

/kind cleanup
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kbhawkey

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[utkarsh-singh1]

Hi @Sea-n @kbhawkey, thanks for reviewing and approving this PR.