Bump hashbrown from 0.12.1 to 0.12.2 in /bin/fuzz (#2500)

Bumps [hashbrown](https://github.com/rust-lang/hashbrown) from 0.12.1 to 0.12.2.
- [Release notes](https://github.com/rust-lang/hashbrown/releases)
- [Changelog](https://github.com/rust-lang/hashbrown/blob/master/CHANGELOG.md)
- [Commits](rust-lang/hashbrown@v0.12.1...v0.12.2)

---
updated-dependencies:
- dependency-name: hashbrown
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>