Bump dlmalloc from 0.2.1 to 0.2.2 (#4205)

Bumps [dlmalloc](https://github.com/alexcrichton/dlmalloc-rs) from 0.2.1 to 0.2.2.
- [Release notes](https://github.com/alexcrichton/dlmalloc-rs/releases)
- [Commits](https://github.com/alexcrichton/dlmalloc-rs/compare/0.2.1...0.2.2

)

---
updated-dependencies:
- dependency-name: dlmalloc
  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>