chore(deps-dev): Update tox requirement from 4.18.1 to 4.20.0

Updates the requirements on [tox](https://github.com/tox-dev/tox) to permit the latest version.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/main/docs/changelog.rst)
- [Commits](tox-dev/tox@4.18.1...4.20.0)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:development
...

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

pyproject.toml

@@ -92,7 +92,7 @@ isort = "5.13.2"
 autopep8 = "2.3.1"
 mypy = "1.11.2"
 bandit = "1.7.9"
-tox = "4.18.1"
+tox = "4.20.0"
 # min version required to be able to install some dependencies
 # see https://github.com/MichaelKim0407/flake8-use-fstring/issues/33
 setuptools = ">= 47.0.0"