submodule: bump openthread from `c36c0e7` to `9e26a5d` (#164)
submodule: bump openthread from `c36c0e7` to `9e26a5d` (#164)

Bumps [openthread](https://github.com/openthread/openthread) from `c36c0e7` to `9e26a5d`.
- [Commits](https://github.com/openthread/openthread/compare/c36c0e77a2465355bcf13bd7dc718d8c9aa6ff64...9e26a5deab8d8af348a2db032d78b14f5541067c)

---
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-efr32,openthread/ot-efr32,openthread/ot-efr32