submodule: bump openthread from `11ac430` to `3a7e836` (#73)
submodule: bump openthread from `11ac430` to `3a7e836` (#73)

Bumps [openthread](https://github.com/openthread/openthread) from `11ac430` to `3a7e836`.
- [Commits](https://github.com/openthread/openthread/compare/11ac430155c7153b1fcb3d2f0545533724b6e6d0...3a7e836dd7c96a932cbd8ab7733b1042bfd86588)

---
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