Deps: Bump the python-packages group with 2 updates

Bumps the python-packages group with 2 updates: [importlib-metadata](https://github.com/python/importlib_metadata) and [tornado](https://github.com/tornadoweb/tornado).


Updates `importlib-metadata` from 6.8.0 to 7.0.0
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@v6.8.0...v7.0.0)

Updates `tornado` from 6.3.3 to 6.4
- [Changelog](https://github.com/tornadoweb/tornado/blob/master/docs/releases.rst)
- [Commits](tornadoweb/tornado@v6.3.3...v6.4.0)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: python-packages
- dependency-name: tornado
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-packages
...

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