Bump tox from 4.16.0 to 4.18.0 (#2463)

Bumps [tox](https://github.com/tox-dev/tox) from 4.16.0 to 4.18.0.
- [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/4.16.0...4.18.0)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:production
  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>

requirements-test.txt

@@ -1,3 +1,3 @@
 coveralls==4.0.1
 pre-commit==3.8.0
-tox==4.16.0
+tox==4.18.0