submodule: bump openthread from `2592e34` to `ca8799a` (#445)
submodule: bump openthread from `2592e34` to `ca8799a` (#445)

Bumps [openthread](https://github.com/openthread/openthread) from `2592e34` to `ca8799a`.
- [Commits](https://github.com/openthread/openthread/compare/2592e3433a178e8441eaafbb6efdf6396067f2a4...ca8799a4b86a38a89ee339b399d24e0c095fd0d8)

---
updated-dependencies:
- dependency-name: openthread
  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-efr32,openthread/ot-efr32,openthread/ot-efr32