submodule: bump third_party/openthread/repo from 4a9fb06 to `505850…
#986
| Job | Run time |
|---|---|
| 4m 54s | |
| 4m 54s |
4a9fb06 to `505850…
#986
| Job | Run time |
|---|---|
| 4m 54s | |
| 4m 54s |