submodule: bump openthread from `3e82174` to `545c089` (#138)
submodule: bump openthread from `3e82174` to `545c089` (#138)

Bumps [openthread](https://github.com/openthread/openthread) from `3e82174` to `545c089`.
- [Commits](https://github.com/openthread/openthread/compare/3e82174c53f98f954f921a3574015de34d56fcd8...545c0894298b2cc504bd89e60695024d4c2e10b1)

---
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-cc2538,openthread/ot-cc2538