chore(deps): update helm release traefik to v42 (#320)
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [traefik](https://traefik.io/) ([source](https://github.com/traefik/traefik-helm-chart)) | HelmChart | major | `41.7.1` → `42.0.0` |
---
### Release Notes
<details>
<summary>traefik/traefik-helm-chart (traefik)</summary>
### [`v42.0.0`](https://github.com/traefik/traefik-helm-chart/releases/tag/v42.0.0)
[Compare Source](https://github.com/traefik/traefik-helm-chart/compare/v41.7.1...v42.0.0)
There are 3 breaking changes in this release
**Upgrade Notes**
1. **Kubernetes v1.30+**: The chart now requires Kubernetes v1.30 or higher ([#​2030](https://github.com/traefik/traefik-helm-chart/pull/2030)).
2. **Traefik Hub Secret RBAC**: Write verbs on Secrets (`create`, `update`, `delete`) are no longer granted cluster-wide.
- A `Role` now grants them in the release namespace only, where Traefik Hub writes its Secrets ([#​2028](https://github.com/traefik/traefik-helm-chart/pull/2028))
3. **Transparency logs witnesses**: ([#​2018](https://github.com/traefik/traefik-helm-chart/pull/2018)):
- `hub.transparencyLogs.witnessGroup.witnesses` now defaults to `null` and `threshold` must be at least `1`.
- Setting `threshold`, `timeout` or `failOpen` without any witness now fails.
> \[!NOTE]
> With `hub.token`, the chart now deploys a cluster-scoped `ValidatingAdmissionPolicy` that only allows Traefik Hub to write `Opaque` and `kubernetes.io/tls` Secrets.
> Set `hub.restrictSecretTypes: false` if the installer cannot create cluster-scoped resources.
#### 💥 BREAKING CHANGES
- fix(tlogs)!: empty witness config [#​2018](https://github.com/traefik/traefik-helm-chart/issues/2018) by [@​LBF38](https://github.com/LBF38)
- feat(chart)!: require Kubernetes v1.30 or higher [#​2030](https://github.com/traefik/traefik-helm-chart/issues/2030) by [@​mloiseleur](https://github.com/mloiseleur)
- fix(rbac)!: 🐛 scope Traefik Hub secret write permissions to release namespace [#​2028](https://github.com/traefik/traefik-helm-chart/issues/2028) by [@​mloiseleur](https://github.com/mloiseleur)
#### 🚀 Features
- feat(hub): 🚀 support traefik hub v3.20.16 and v3.21.3 [#​2032](https://github.com/traefik/traefik-helm-chart/issues/2032) by [@​mloiseleur](https://github.com/mloiseleur)
- feat(hub): restrict Secret types written by Traefik Hub [#​2031](https://github.com/traefik/traefik-helm-chart/issues/2031) by [@​mloiseleur](https://github.com/mloiseleur)
#### 🐛 Bug fixes
- fix(examples): fix outdated value schema used in `additionalServices` example [#​2023](https://github.com/traefik/traefik-helm-chart/issues/2023) by [@​jnoordsij](https://github.com/jnoordsij)
#### 📦 Others
- chore(deps): update github actions [#​2024](https://github.com/traefik/traefik-helm-chart/issues/2024) by [@​renovate-with-github-actions](https://github.com/renovate-with-github-actions)\[bot]
- chore(deps): update quay.io/helmpack/chart-testing docker tag to v3.15.0 [#​2025](https://github.com/traefik/traefik-helm-chart/issues/2025) by [@​renovate-with-github-actions](https://github.com/renovate-with-github-actions)\[bot]
- docs(agents): document Traefik Hub version bump [#​2033](https://github.com/traefik/traefik-helm-chart/issues/2033) by [@​mloiseleur](https://github.com/mloiseleur)
- docs(examples): add Traefik Hub Gateway with the Traefik MCP server as a sidecar [#​2007](https://github.com/traefik/traefik-helm-chart/issues/2007) by [@​emilevauge](https://github.com/emilevauge)
- chore(release): 🚀 publish 42.0.0 [#​2034](https://github.com/traefik/traefik-helm-chart/issues/2034) by [@​mloiseleur](https://github.com/mloiseleur)
#### 👌 Traefik version support
- Traefik Proxy: v3.6.0 -> v3.7.14 (default)
- Traefik Hub: v3.19.3 -> v3.21.3
</details>
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