build(deps): bump pybind11 from 2.13.5 to 2.13.6

Bumps [pybind11](https://github.com/pybind/pybind11) from 2.13.5 to 2.13.6.
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Changelog](https://github.com/pybind/pybind11/blob/master/docs/changelog.rst)
- [Commits](pybind/pybind11@v2.13.5...v2.13.6)

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

Signed-off-by: dependabot[bot] <support@github.com>