ci(deps-dev): Bump tox from 4.15.1 to 4.18.0 in /.github/workflows

Bumps [tox](https://github.com/tox-dev/tox) from 4.15.1 to 4.18.0.
- [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@4.15.1...4.18.0)

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

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

.github/workflows/constraints.txt

@@ -1,3 +1,3 @@
 pip==24.1.1
 poetry==1.8.3
-tox==4.15.1
+tox==4.18.0