submodule: bump openthread from `cbd1d50` to `d51eb07` (#197)
submodule: bump openthread from `cbd1d50` to `d51eb07` (#197)

Bumps [openthread](https://github.com/openthread/openthread) from `cbd1d50` to `d51eb07`.
- [Commits](https://github.com/openthread/openthread/compare/cbd1d5099537b4110c2f5e88bd30d8ec62f59e4a...d51eb07c62d0127c7c854fc0bfd06a9f00b2a681)

---
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-b91,openthread/ot-b91