submodule: bump openthread from `3be955b` to `7e4ada6` (#241)
submodule: bump openthread from `3be955b` to `7e4ada6` (#241)

Bumps [openthread](https://github.com/openthread/openthread) from `3be955b` to `7e4ada6`.
- [Commits](https://github.com/openthread/openthread/compare/3be955b28b91356cd5656e8877c46b57cb5765b3...7e4ada6f169a85ba118e54f90c4a18d1151b6ba9)

---
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-kw41z,openthread/ot-kw41z