chore(deps): update dependency goharbor/harbor to v2.15.0 (#4913)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [goharbor/harbor](https://github.com/goharbor/harbor) | minor | `v2.14.3` → `v2.15.0` |

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> ⚠️ **Warning**
>
> Some dependencies could not be looked up. Check the [Dependency Dashboard](issues/2) for more information.

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### Release Notes

<details>
<summary>goharbor/harbor (goharbor/harbor)</summary>

### [`v2.15.0`](https://github.com/goharbor/harbor/releases/tag/v2.15.0)

[Compare Source](https://github.com/goharbor/harbor/compare/v2.14.3...v2.15.0-rc2)

{"buildNo":"rc4"}

</details>

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### Configuration

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🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #4913
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/harbor/Chart.yaml

@@ -29,4 +29,4 @@ dependencies:
     repository: oci://harbor.alexlebens.net/helm-charts
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/harbor.png
 # renovate: datasource=github-releases depName=goharbor/harbor
-appVersion: v2.14.3
+appVersion: v2.15.0