submodule: bump openthread from `3a7e836` to `57d072d` (#74)
submodule: bump openthread from `3a7e836` to `57d072d` (#74)

Bumps [openthread](https://github.com/openthread/openthread) from `3a7e836` to `57d072d`.
- [Commits](https://github.com/openthread/openthread/compare/3a7e836dd7c96a932cbd8ab7733b1042bfd86588...57d072d352893ed9a7768de5b61198046c5b3f42)

---
updated-dependencies:
- dependency-name: openthread
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
openthread/ot-qorvo,openthread/ot-qorvo,openthread/ot-qorvo