submodule: bump openthread from `812fc1e` to `a193a6f` (#147)
submodule: bump openthread from `812fc1e` to `a193a6f` (#147)

Bumps [openthread](https://github.com/openthread/openthread) from `812fc1e` to `a193a6f`.
- [Commits](https://github.com/openthread/openthread/compare/812fc1eaead946b00f6b32387cf2381709fe793c...a193a6f23a70fd2413538d251328eb027dcb5cf3)

---
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