chore(deps): Bump carvel.dev/ytt from 0.51.0 to 0.51.1 in /hack

Bumps [carvel.dev/ytt](https://github.com/carvel-dev/ytt) from 0.51.0 to 0.51.1.
- [Release notes](https://github.com/carvel-dev/ytt/releases)
- [Changelog](https://github.com/carvel-dev/ytt/blob/develop/.goreleaser.yml)
- [Commits](carvel-dev/ytt@v0.51.0...v0.51.1)

---
updated-dependencies:
- dependency-name: carvel.dev/ytt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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