submodule: bump openthread from `74f5ab5` to `bef3f6e` (#209)
submodule: bump openthread from `74f5ab5` to `bef3f6e` (#209)

Bumps [openthread](https://github.com/openthread/openthread) from `74f5ab5` to `bef3f6e`.
- [Commits](https://github.com/openthread/openthread/compare/74f5ab5c9f434c4ffe44c580be40b7ff14e7f0e9...bef3f6e024394640ff8065a2862ebc3bc762de00)

---
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