Bump the k8s group with 2 updates

Bumps the k8s group with 2 updates: [kube](https://github.com/kube-rs/kube) and [k8s-openapi](https://github.com/Arnavion/k8s-openapi).


Updates `kube` from 0.86.0 to 0.90.0
- [Release notes](https://github.com/kube-rs/kube/releases)
- [Changelog](https://github.com/kube-rs/kube/blob/main/CHANGELOG.md)
- [Commits](kube-rs/kube@0.86.0...0.90.0)

Updates `k8s-openapi` from 0.20.0 to 0.21.1
- [Release notes](https://github.com/Arnavion/k8s-openapi/releases)
- [Changelog](https://github.com/Arnavion/k8s-openapi/blob/master/CHANGELOG.md)
- [Commits](Arnavion/k8s-openapi@v0.20.0...v0.21.1)

---
updated-dependencies:
- dependency-name: kube
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: k8s
- dependency-name: k8s-openapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: k8s
...

Signed-off-by: dependabot[bot] <[email protected]>