docs: add error message for cargo test on darwin
#1234
| Job | Run time |
|---|---|
| 1m 27s | |
| 5m 50s | |
| 46s | |
| 8m 3s |
cargo test on darwin
#1234
| Job | Run time |
|---|---|
| 1m 27s | |
| 5m 50s | |
| 46s | |
| 8m 3s |