Bump tox from 4.13.0 to 4.16.0 (#376)

Bumps [tox](https://github.com/tox-dev/tox) from 4.13.0 to 4.16.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/main/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/4.13.0...4.16.0)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

dev-requirements.txt

@@ -4,6 +4,6 @@ flake8==7.0.0
 freezegun==1.4.0
 pytest==8.1.0
 pytest-cov==5.0.0
-tox==4.13.0
+tox==4.16.0
 bumpversion==0.6.0
 wheel==0.43.0