submodule: bump openthread from `6f537ca` to `2f7f3bf` (#78)
submodule: bump openthread from `6f537ca` to `2f7f3bf` (#78)

Bumps [openthread](https://github.com/openthread/openthread) from `6f537ca` to `2f7f3bf`.
- [Commits](https://github.com/openthread/openthread/compare/6f537ca34a56b26ac380e9104b4db6e109427b41...2f7f3bf5d94b35c437ad970bb200c558c77d6508)

---
updated-dependencies:
- dependency-name: openthread
  dependency-type: direct:production
...

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

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