Incorrect login hint for deploying with a custom network(bridge)

Actual:
```bash
(.venv) ubuntu@node0:~/genesis_core$ sudo genesis bootstrap -i output/genesis-core.qcow2  -m core --bridge br0 --cidr 10.10.0.0/22 -f
Starting genesis bootstrap in 'core' mode
Launched genesis installation
The stand genesis-core will be ready soon at:
ssh ubuntu@10.20.0.2
```

Expected:
```bash
...
ssh ubuntu@10.10.0.2
```