add styfle/cancel-workflow-action to github actions to cancel previous runs
#895
| Job | Run time |
|---|---|
| 1m 10s | |
| 1m 44s | |
| 22s | |
| 17s | |
| 26s | |
| 57s | |
| 1m 38s | |
| 1m 57s | |
| 27s | |
| 25s | |
| 9m 23s |