[DOC] Add a reference to mendeleev-data repo (#217)
#464
| Job | Run time |
|---|---|
| 6m 57s | |
| 7m 2s | |
| 6m 36s | |
| 7m 9s | |
| 6m 42s | |
| 5m 28s | |
| 5m 27s | |
| 5m 25s | |
| 5m 13s | |
| 4m 42s | |
| 8m 0s | |
| 8m 9s | |
| 8m 0s | |
| 7m 44s | |
| 8m 14s | |
| 9s | |
| 1h 40m 57s |