🌱 Bump the dependencies group in /hack/tools with 2 updates

Bumps the dependencies group in /hack/tools with 2 updates: [sigs.k8s.io/kind](https://github.com/kubernetes-sigs/kind) and [sigs.k8s.io/promo-tools/v4](https://github.com/kubernetes-sigs/promo-tools).


Updates `sigs.k8s.io/kind` from 0.20.0 to 0.21.0
- [Release notes](https://github.com/kubernetes-sigs/kind/releases)
- [Commits](kubernetes-sigs/kind@v0.20.0...v0.21.0)

Updates `sigs.k8s.io/promo-tools/v4` from 4.0.4 to 4.0.5
- [Release notes](https://github.com/kubernetes-sigs/promo-tools/releases)
- [Changelog](https://github.com/kubernetes-sigs/promo-tools/blob/main/RELEASE.md)
- [Commits](kubernetes-sigs/promo-tools@v4.0.4...v4.0.5)

---
updated-dependencies:
- dependency-name: sigs.k8s.io/kind
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
- dependency-name: sigs.k8s.io/promo-tools/v4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
...

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

Author: dependabot[bot]