submodule: bump third_party/openthread/repo from a9805ed to 3a28b7b
#5757
| Job | Run time |
|---|---|
| 1m 55s | |
| 1m 55s |
a9805ed to 3a28b7b
#5757
| Job | Run time |
|---|---|
| 1m 55s | |
| 1m 55s |