chore(deps-dev): bump pybind11-stubgen from 2.3 to 2.3.4

Bumps [pybind11-stubgen](https://github.com/sizmailov/pybind11-stubgen) from 2.3 to 2.3.4.
- [Release notes](https://github.com/sizmailov/pybind11-stubgen/releases)
- [Changelog](https://github.com/sizmailov/pybind11-stubgen/blob/master/CHANGELOG.md)
- [Commits](sizmailov/pybind11-stubgen@v2.3...v.2.3.4)

---
updated-dependencies:
- dependency-name: pybind11-stubgen
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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