build: bump jupytext from 1.16.4 to 1.16.6

Bumps [jupytext](https://github.com/mwouts/jupytext) from 1.16.4 to 1.16.6.
- [Release notes](https://github.com/mwouts/jupytext/releases)
- [Changelog](https://github.com/mwouts/jupytext/blob/main/CHANGELOG.md)
- [Commits](mwouts/jupytext@v1.16.4...v1.16.6)

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

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