Bump python_orocos_kdl/pybind11 from eef24d6 to d6ae0e1 (#499)

Bumps [python_orocos_kdl/pybind11](https://github.com/pybind/pybind11) from `eef24d6` to `d6ae0e1`.
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Commits](pybind/pybind11@eef24d6...d6ae0e1)

---
updated-dependencies:
- dependency-name: python_orocos_kdl/pybind11
  dependency-version: d6ae0e163a6fb414c81c7f4a98291460e5a18bfe
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]