Fix chrono-systemd-time broken link in README.md
#519
| Job | Run time |
|---|---|
| 9s | |
| 1m 13s | |
| 46s | |
| 1m 2s | |
| 1m 14s | |
| 1m 7s | |
| 1m 11s | |
| 1m 1s | |
| 1m 24s | |
| 1m 17s | |
| 1m 9s | |
| 1m 9s | |
| 1m 16s | |
| 1m 14s | |
| 1m 9s | |
| 1m 25s | |
| 1m 15s | |
| 19m 1s |