build: update rules_browsers digest to 508168a (20.3.x) #8971
| Job | Run time |
|---|---|
| 2m 13s | |
| 2m 20s | |
| 2m 8s | |
| 5s | |
| 6m 30s | |
| 3m 22s | |
| 7m 24s | |
| 5m 47s | |
| 5m 44s | |
| 5m 29s | |
| 4m 43s | |
| 8m 17s | |
| 10m 9s | |
| 10m 54s | |
| 8m 42s | |
| 9m 50s | |
| 8m 48s | |
| 9m 1s | |
| 6m 16s | |
| 6m 48s | |
| 0s | |
| 8m 25s | |
| 11m 58s | |
| 9m 0s | |
| 4m 38s | |
| 2h 38m 31s |