Update tox requirement from ==4.22.* to ==4.23.*

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@4.22.0...4.23.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements-test.txt

@@ -1,4 +1,4 @@
 coverage == 7.6.*
 mypy == 1.11.*
 pre-commit == 4.0.*
-tox == 4.22.*
+tox == 4.23.*