submodule: bump third_party/openthread/repo from `11a24d1` to `c6179c2` (#1590)
submodule: bump third_party/openthread/repo from `11a24d1` to `c6179c2` (#1590)

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `11a24d1` to `c6179c2`.
- [Commits](https://github.com/openthread/openthread/compare/11a24d111f16a60a241ea0c4753e7bd28a5c4c93...c6179c24ed75a11c14dc4b1fffcde58be0bda785)

---
updated-dependencies:
- dependency-name: third_party/openthread/repo
  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-br-posix,openthread/ot-br-posix,openthread/ot-br-posix,openthread/borderrouter,openthread/ot-br-posix,openthread/ot-br-posix,openthread/borderrouter,openthread/borderrouter,openthread/borderrouter,openthread/ot-br-posix,openthread/borderrouter,openthread/borderrouter