submodule: bump openthread from `7e8b482` to `61d9e72` (#360)
submodule: bump openthread from `7e8b482` to `61d9e72` (#360)

Bumps [openthread](https://github.com/openthread/openthread) from `7e8b482` to `61d9e72`.
- [Commits](https://github.com/openthread/openthread/compare/7e8b482e3c89bd3aca847ada447ce141d8baa48a...61d9e72c18588d6ee3a9b9a2720f65e7d39bdb87)

---
updated-dependencies:
- dependency-name: openthread
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
openthread/ot-samr21,openthread/ot-samr21