Bump third_party/openthread/repo from 922cf5a to 0f94f26 (#26032)

Bumps [third_party/openthread/repo](https://github.com/openthread/openthread) from `922cf5a` to `0f94f26`.
- [Release notes](https://github.com/openthread/openthread/releases)
- [Commits](openthread/openthread@922cf5a...0f94f26)

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

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