Bump pytools from 2024.1.18 to 2024.1.21

Bumps [pytools](https://github.com/inducer/pytools) from 2024.1.18 to 2024.1.21.
- [Release notes](https://github.com/inducer/pytools/releases)
- [Commits](https://github.com/inducer/pytools/compare/v2024.1.18...v2024.1.21

)

---
updated-dependencies:
- dependency-name: pytools
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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