submodule: bump openthread from `bec3a5e` to `390efb4` (#117)
submodule: bump openthread from `bec3a5e` to `390efb4` (#117)

Bumps [openthread](https://github.com/openthread/openthread) from `bec3a5e` to `390efb4`.
- [Commits](https://github.com/openthread/openthread/compare/bec3a5edb02df8b4b8497b24d0caf1d5d61afdad...390efb4c38a7a13ea798cd633c6a3aed05afc05b)

---
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-ifx,Infineon/ot-ifx-release,Infineon/ot-ifx-release,openthread/ot-ifx,Infineon/ot-ifx-release,openthread/ot-ifx