Update six requirement from >=1.9.0 to >=1.17.0

Updates the requirements on [six](https://github.com/benjaminp/six) to permit the latest version.
- [Changelog](https://github.com/benjaminp/six/blob/main/CHANGES)
- [Commits](benjaminp/six@1.9.0...1.17.0)

---
updated-dependencies:
- dependency-name: six
  dependency-version: 1.17.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 certifi>=14.05.14 # MPL
-six>=1.9.0  # MIT
+six>=1.17.0  # MIT
 python-dateutil>=2.5.3  # BSD
 setuptools>=21.0.0  # PSF/ZPL
 pyyaml>=5.4.1  # MIT