build(deps): bump tornado from 6.5.5 to 6.5.6 (#1101)

Bumps [tornado](https://github.com/tornadoweb/tornado) from 6.5.5 to 6.5.6.
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.5.5...v6.5.6)

---
updated-dependencies:
- dependency-name: tornado
  dependency-version: 6.5.6
  dependency-type: indirect
...

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

Author: dependabot[bot]