submodule: bump openthread from `130afd9` to `512d072` (#306)
submodule: bump openthread from `130afd9` to `512d072` (#306)

Bumps [openthread](https://github.com/openthread/openthread) from `130afd9` to `512d072`.
- [Commits](https://github.com/openthread/openthread/compare/130afd9bb6d02f2a07e86b824fb7a79e9fca5fe0...512d0728895641061d25dbbc545f0256d3535865)

---
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-efr32,openthread/ot-efr32,openthread/ot-efr32