Fix the path to the publish task

[afrittoli]

Changes

/kind misc

Submitter Checklist

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• [ ] Has Docs included if any changes are user facing
• [ ] Has Tests included if any functionality added or changed
• [x] Follows the commit message standard
• [x] Meets the Tekton contributor standards (including functionality, content, code)
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Release Notes

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[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lcarva

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[afrittoli]

/test pull-tekton-chains-integration-tests