Bump python_orocos_kdl/pybind11 from 787d2c8 to e315e1f (#361)

Bumps [python_orocos_kdl/pybind11](https://github.com/pybind/pybind11) from `787d2c8` to `e315e1f`.
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Commits](pybind/pybind11@787d2c8...e315e1f)

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

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

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