submodule: bump openthread from `48b129e` to `38cb99f` (#79)
submodule: bump openthread from `48b129e` to `38cb99f` (#79)

Bumps [openthread](https://github.com/openthread/openthread) from `48b129e` to `38cb99f`.
- [Commits](https://github.com/openthread/openthread/compare/48b129e74b19bef719cf8388906ef2e7903eae87...38cb99f0fc2b608817e7861afc44e89d27992fa1)

---
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-cc13x2-cc26x2,openthread/ot-cc13x2-cc26x2