Bump tox from 4.11.3 to 4.11.4

Bumps [tox](https://github.com/tox-dev/tox) from 4.11.3 to 4.11.4.
- [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@4.11.3...4.11.4)

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

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

requirements/testing.txt

@@ -8,6 +8,6 @@ pytest-cov==4.1.0
 pytest-icdiff==0.8
 ruff==0.1.6
 setuptools==69.0.2
-tox==4.11.3
+tox==4.11.4
 tox-gh-actions==3.1.3
 mypy==1.7.1