Fix return value for sync verification (#204)

* Fix return value for sync verification

* Check for failed challenge verification count properly

---------

Co-authored-by: Kevin Chung <kchung@ctfd.io>

Author: sdalv1k

ctfcli/cli/challenges.py

@@ -1047,10 +1047,10 @@ def verify(self, challenge: str | None = None, ignore: tuple[str] = ()) -> int:
                 for challenge_instance in challenges_out_of_sync:
                     click.echo(f" - {challenge_instance}")
 
-            if len(challenges_out_of_sync) > 1:
+            if len(challenges_out_of_sync) >= 1:
                 return 2
 
-            return 1
+            return 0
 
         click.secho("Verification failed for:", fg="red")
         for challenge_instance in failed_verifications: