submodule: bump openthread from `51db0e5` to `01009a3` (#157)
submodule: bump openthread from `51db0e5` to `01009a3` (#157)

Bumps [openthread](https://github.com/openthread/openthread) from `51db0e5` to `01009a3`.
- [Commits](https://github.com/openthread/openthread/compare/51db0e54d74b6cf68f1b95e8f63874855d8e8a6d...01009a3effc66ed8da7578a398bd576e6651c492)

---
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-samr21,openthread/ot-samr21