docs: update FLAGS.md for new hudson-scan integration

Author: kaifcodec

docs/FLAGS.md

@@ -8,6 +8,7 @@
 | `-ef, --email-file FILE`    | Scan multiple emails from file (one per line)               |
 | `--only-found`              | Only show sites where the username/email was found          |
 | `--allow-loud`              | Enable scanning sites that may send emails/notifications    |
+| `--hudson, --hudson-scan`   | Check for infostealer intelligence using Hudson Rock's API  |
 | `-c, --category CATEGORY`   | Scan all platforms in a specific category                   |
 | `-lu, --list-user`          | List all available modules for username scanning            |
 | `-le, --list-email`         | List all available modules for email scanning               |