Output release manifest URLs in release pipeline logs

[AlanGreene]

Changes

/kind misc

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As the author of this PR, please check off the items in this checklist:

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• Tests included if any functionality added or changed
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Release Notes

NONE

[tekton-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kaushalnavneet
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[kaushalnavneet]

/lgtm

[AlanGreene]

/easycla

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: AlanGreene / name: Alan Greene (7120699)