submodule: bump openthread from `a193a6f` to `69bfc4b` (#116)
submodule: bump openthread from `a193a6f` to `69bfc4b` (#116)

Bumps [openthread](https://github.com/openthread/openthread) from `a193a6f` to `69bfc4b`.
- [Commits](https://github.com/openthread/openthread/compare/a193a6f23a70fd2413538d251328eb027dcb5cf3...69bfc4b1c0b5f6597ce4744d68e501bf063c9ee6)

---
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-kw41z,openthread/ot-kw41z