Improve JSON validation in start-proxy action
#7107
| Job | Run time |
|---|---|
| 4m 35s | |
| 7m 50s | |
| 7m 58s | |
| 4m 17s | |
| 4m 3s | |
| 4m 28s | |
| 9m 40s | |
| 3m 55s | |
| 3m 44s | |
| 9m 28s | |
| 8m 21s | |
| 8m 23s | |
| 7m 37s | |
| 4m 10s | |
| 4m 8s | |
| 9m 17s | |
| 1h 41m 54s |