Update tox requirement from >=3.24.4 to >=4.30.3

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@3.24.4...4.30.3)

---
updated-dependencies:
- dependency-name: tox
  dependency-version: 4.30.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/pkgutils.txt

@@ -1,7 +1,7 @@
 setuptools>=59.2.0
 wheel>=0.37.0
 flake8>=7.3.0
-tox>=3.24.4
+tox>=4.30.3
 sphinx2rst>=1.1.0
 bumpversion
 pydocstyle