Bump github.com/goreleaser/goreleaser from 1.18.2 to 1.21.2 in /tools

Bumps [github.com/goreleaser/goreleaser](https://github.com/goreleaser/goreleaser) from 1.18.2 to 1.21.2.
- [Release notes](https://github.com/goreleaser/goreleaser/releases)
- [Changelog](https://github.com/goreleaser/goreleaser/blob/main/.goreleaser.yaml)
- [Commits](goreleaser/goreleaser@v1.18.2...v1.21.2)

---
updated-dependencies:
- dependency-name: github.com/goreleaser/goreleaser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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