submodule: bump openthread from `a65afcd` to `71ebacc` (#179)
submodule: bump openthread from `a65afcd` to `71ebacc` (#179)

Bumps [openthread](https://github.com/openthread/openthread) from `a65afcd` to `71ebacc`.
- [Commits](https://github.com/openthread/openthread/compare/a65afcdbb011eed76d24917f2b95a75ff66c2d5d...71ebacca53dd34d7b71da668f5f5dc430bb027cb)

---
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-nxp,openthread/ot-nxp,openthread/ot-nxp