Bump tox from 4.7.0 to 4.9.0 in /test

Bumps [tox](https://github.com/tox-dev/tox) from 4.7.0 to 4.9.0.
- [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/4.7.0...4.9.0)

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

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

test/requirements.txt

@@ -2,5 +2,5 @@ pyyaml == 6.0.1
 pytest == 7.4.0
 pytest-xdist == 3.3.1
 pytest-testinfra == 8.1.0
-tox == 4.7.0
+tox == 4.9.0