Fix manifest warnings model registry

[mahdikhashan]

Pull Request Template for Kubeflow Manifests

✏️ Summary of Changes

Describe the changes you have made, including any refactoring or feature additions.

I'm fixing the warning of build of kustomization.yaml files for model-registry

📦 Dependencies

List any dependencies or related PRs (e.g., "Depends on #123").

🐛 Related Issues

Link any issues that are resolved or affected by this PR.

part of #2991

✅ Contributor Checklist

• I have tested these changes with kustomize. See Installation Prerequisites.
• All commits are signed-off to satisfy the DCO check.

---

You can join the CNCF Slack and access our meetings at the Kubeflow Community website. Our channel on the CNCF Slack is here #kubeflow-platform.

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment