changing cosign certificate identity url to use github.repository

[acornett21]

• Changing cosign certificate identy url to use github.repository so the cosign action can be tested in forks.

Testing

• This release shows that the fix from yesterday, resolves the cosign issue.

[dcibot]

from change https://github.com/redhat-openshift-ecosystem/openshift-preflight/pull/1146:

• SUCCESS https://www.distributed-ci.io/jobs/983b35a7-29ce-4ba3-b719-65564eb6d786/jobStates

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: acornett21, bcrochet, komish

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/redhat-openshift-ecosystem/openshift-preflight/blob/main/OWNERS)~~ [acornett21,bcrochet,komish] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment