submodule: bump third_party/openthread/repo from bc54d67 to 6bc9309
#6376
| Job | Run time |
|---|---|
| 7m 57s | |
| 7m 57s |
bc54d67 to 6bc9309
#6376
| Job | Run time |
|---|---|
| 7m 57s | |
| 7m 57s |