submodule: bump openthread from `77fd973` to `3d5c4b4` (#369)
submodule: bump openthread from `77fd973` to `3d5c4b4` (#369)

Bumps [openthread](https://github.com/openthread/openthread) from `77fd973` to `3d5c4b4`.
- [Commits](https://github.com/openthread/openthread/compare/77fd973a768a5e4877e94cbb5d594526d0ccc210...3d5c4b41df175f08b23379d03a62218cecbf2f35)

---
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-cc13x2-cc26x2,openthread/ot-cc13x2-cc26x2