submodule: bump openthread from `d1ae06e` to `39a1f55` (#192)
submodule: bump openthread from `d1ae06e` to `39a1f55` (#192)

Bumps [openthread](https://github.com/openthread/openthread) from `d1ae06e` to `39a1f55`.
- [Commits](https://github.com/openthread/openthread/compare/d1ae06ea20c65e2082f9eb89a1eee4120ca6446a...39a1f55447f3eec0cf089d8bec29b3303f3e7f99)

---
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-nrf528xx,openthread/ot-nrf528xx