Fix typo in example
The example command is missing the `s` in `preauthkeys`
@@ -93,7 +93,7 @@ Alternatively, you can use Auth Keys to register your machines:
1. Create an authkey
```shell
- headscale -n myfirstnamespace preauthkey create --reusable --expiration 24h
+ headscale -n myfirstnamespace preauthkeys create --reusable --expiration 24h
```
2. Use the authkey from your machine to register it
