submodule: bump openthread from `5b6654d` to `f766d80` (#22)
submodule: bump openthread from `5b6654d` to `f766d80` (#22)

Bumps [openthread](https://github.com/openthread/openthread) from `5b6654d` to `f766d80`.
- [Commits](https://github.com/openthread/openthread/compare/5b6654d0bccaad436193a08a79a545e8a22b64a0...f766d8047d188a49d0a186815cc03221cf430f5a)

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