Webhooks: Fix typo in retry interval

src/pretix/api/webhooks.py

@@ -476,7 +476,7 @@ def send_webhook(self, logentry_id: int, action_type: str, webhook_id: int, retr
         300,  # + 5 minutes
         1200,  # + 20 minutes
         3600,  # + 60 minutes
-        1440,  # + 4 hours
+        14400,  # + 4 hours
         21600,  # + 6 hours
         43200,  # + 12 hours
         43200,  # + 24 hours