build(deps): bump tox from 4.19.0 to 4.20.0 (#377)

Bumps [tox](https://github.com/tox-dev/tox) from 4.19.0 to 4.20.0.
- [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@4.19.0...4.20.0)

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

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

requirements_test.txt

@@ -6,7 +6,7 @@ mypy==1.11.2
 pydocstyle==6.3.0
 isort
 pylint==3.2.7
-tox==4.19.0
+tox==4.20.0
 aioresponses
 pytest
 aiohttp_cors