Bump the kube group across 1 directory with 4 updates

Bumps the kube group with 4 updates in the /cmd/pinniped-proxy directory: [kube](https://github.com/kube-rs/kube), [kube-derive](https://github.com/kube-rs/kube), [kube-runtime](https://github.com/kube-rs/kube) and [k8s-openapi](https://github.com/Arnavion/k8s-openapi).


Updates `kube` from 0.88.1 to 0.91.0
- [Release notes](https://github.com/kube-rs/kube/releases)
- [Changelog](https://github.com/kube-rs/kube/blob/main/CHANGELOG.md)
- [Commits](kube-rs/kube@0.88.1...0.91.0)

Updates `kube-derive` from 0.88.1 to 0.96.0
- [Release notes](https://github.com/kube-rs/kube/releases)
- [Changelog](https://github.com/kube-rs/kube/blob/main/CHANGELOG.md)
- [Commits](kube-rs/kube@0.88.1...0.96.0)

Updates `kube-runtime` from 0.88.1 to 0.91.0
- [Release notes](https://github.com/kube-rs/kube/releases)
- [Changelog](https://github.com/kube-rs/kube/blob/main/CHANGELOG.md)
- [Commits](kube-rs/kube@0.88.1...0.91.0)

Updates `k8s-openapi` from 0.21.1 to 0.22.0
- [Release notes](https://github.com/Arnavion/k8s-openapi/releases)
- [Changelog](https://github.com/Arnavion/k8s-openapi/blob/master/CHANGELOG.md)
- [Commits](Arnavion/k8s-openapi@v0.21.1...v0.22.0)

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

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