deps(deps): update tox requirement (#203)

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@4.56.1...4.56.2)

---
updated-dependencies:
- dependency-name: tox
  dependency-version: 4.56.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

constraints.txt

@@ -64,4 +64,4 @@ sphinx>=9.1.0,<10.0.0
 sphinx-rtd-theme>=3.1.0,<4.0.0
 
 # Development utilities
-tox>=4.56.1,<5.0.0
+tox>=4.56.2,<5.0.0