Bump tox from 4.21.1 to 4.21.2 (#1391)

Bumps [tox](https://github.com/tox-dev/tox) from 4.21.1 to 4.21.2.
- [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@4.21.1...4.21.2)

---
updated-dependencies:
- dependency-name: tox
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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