submodule: bump openthread from `3c260bd` to `ab28382` (#235)
submodule: bump openthread from `3c260bd` to `ab28382` (#235)

Bumps [openthread](https://github.com/openthread/openthread) from `3c260bd` to `ab28382`.
- [Commits](https://github.com/openthread/openthread/compare/3c260bd7c7444b9bf446429de3fe46fab09162b3...ab2838211383d2c52f00399ce07ce31cf72f1d64)

---
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-nrf528xx,openthread/ot-nrf528xx