chore(deps): Bump tox in /.github/workflows in the all group

Bumps the all group in /.github/workflows with 1 update: [tox](https://github.com/tox-dev/tox).


Updates `tox` from 4.14.2 to 4.15.0
- [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@4.14.2...4.15.0)

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

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

.github/workflows/constraints.txt

@@ -1,3 +1,3 @@
 pip==24.0
 poetry==1.8.2
-tox==4.14.2
+tox==4.15.0