Installing with --no-verify still uses a green checkmark for verifying step

```sh
$ go run ./cmd/dbc install --no-verify some_driver_unsigned_fixed.tar.gz
Installing from local package: some_driver_unsigned_fixed.tar.gz

[✓] installing
[✓] verifying signature

Installed some_driver_unsigned_fixed 1.10.0 to /Users/bryce/Library/Application Support/ADBC/Drivers
```

I think the `✓` should be a `-` or something to indicate the step was skipped.