submodule: bump third_party/openthread/repo from `d51eb07` to `758f342` (#1342)
submodule: bump third_party/openthread/repo from `d51eb07` to `758f342` (#1342)

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `d51eb07` to `758f342`.
- [Commits](https://github.com/openthread/openthread/compare/d51eb07c62d0127c7c854fc0bfd06a9f00b2a681...758f342a2921c53ab0f03357ef127756474fc340)

---
updated-dependencies:
- dependency-name: third_party/openthread/repo
  dependency-type: direct:production
...

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
openthread/ot-br-posix,openthread/ot-br-posix,openthread/borderrouter,openthread/borderrouter,openthread/borderrouter,openthread/borderrouter,openthread/ot-br-posix,openthread/borderrouter,openthread/borderrouter,openthread/ot-br-posix,openthread/ot-br-posix,openthread/ot-br-posix