Dev: userguide deployment fails

userguide deployment fails.

```
======CMD======
/opt/userguide/.github/scripts/deploy
======END======
2023/04/27 12:38:55 ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
```
https://github.com/codeigniter4/userguide/actions/runs/4819849048/jobs/8583581649