Bump third_party/ot-br-posix/repo from 02421b0 to 13d583e (projec…

…t-chip#31733)

Bumps [third_party/ot-br-posix/repo](https://github.com/openthread/ot-br-posix) from `02421b0` to `13d583e`.
- [Release notes](https://github.com/openthread/ot-br-posix/releases)
- [Commits](openthread/ot-br-posix@02421b0...13d583e)

---
updated-dependencies:
- dependency-name: third_party/ot-br-posix/repo
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>