submodule: bump third_party/openthread/repo from 3702c88 to `8d3975…
#6007
| Job | Run time |
|---|---|
| 7m 28s | |
| 7m 28s |
3702c88 to `8d3975…
#6007
| Job | Run time |
|---|---|
| 7m 28s | |
| 7m 28s |