Update tox requirement from ~=4.11.4 to ~=4.12.0

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@4.11.4...4.12.0)

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

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

requirements.txt

@@ -3,6 +3,6 @@ ansible-lint~=6.22.1
 docker~=7.0.0
 molecule~=6.0.3
 molecule-docker~=2.1.0
-tox~=4.11.4
+tox~=4.12.0
 testinfra~=6.0.0
 yamllint~=1.33.0