Bump src/deps/pybind11 from da8c730 to 7c6f2f8 (AcademySoftwareFoundation#1449)

Bumps [src/deps/pybind11](https://github.com/pybind/pybind11) from `da8c730` to `7c6f2f8`.
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Commits](pybind/pybind11@da8c730...7c6f2f8)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Signed-off-by: Michele Spina <[email protected]>

Author: dependabot[bot]