Bump six from 1.16.0 to 1.17.0 in /docker/py-ews

Bumps [six](https://github.com/benjaminp/six) from 1.16.0 to 1.17.0.
- [Changelog](https://github.com/benjaminp/six/blob/main/CHANGES)
- [Commits](benjaminp/six@1.16.0...1.17.0)

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

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

Author: dependabot[bot]