Bump tokio from 1.27.0 to 1.28.2 in /dask_planner

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.27.0 to 1.28.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.27.0...tokio-1.28.2)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]