⬆️ Bump the submodules group with 3 updates (#398)

Bumps the submodules group with 3 updates: [libs/parallel-hashmap](https://github.com/greg7mdp/parallel-hashmap), [libs/pybind11](https://github.com/pybind/pybind11) and [libs/json](https://github.com/nlohmann/json).


Updates `libs/parallel-hashmap` from `50fa648` to `7ef2e73`
- [Release notes](https://github.com/greg7mdp/parallel-hashmap/releases)
- [Commits](greg7mdp/parallel-hashmap@50fa648...7ef2e73)

Updates `libs/pybind11` from `8b48ff8` to `65370f3`
- [Release notes](https://github.com/pybind/pybind11/releases)
- [Commits](pybind/pybind11@8b48ff8...65370f3)

Updates `libs/json` from `0457de2` to `199dea1`
- [Release notes](https://github.com/nlohmann/json/releases)
- [Commits](nlohmann/json@0457de2...199dea1)

---
updated-dependencies:
- dependency-name: libs/parallel-hashmap
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: libs/pybind11
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: libs/json
  dependency-type: direct:production
  dependency-group: submodules
...

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