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](inducer/pytools@v2024.1.18...v2024.1.21)

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

Signed-off-by: dependabot[bot] <[email protected]>