increase out_of_sync and service_down alerts timeouts

Author: yungwine

modules/alert_bot.py

@@ -48,12 +48,12 @@ class Alert:
     "out_of_sync": Alert(
         "critical",
         "Node is out of sync on {sync} sec.",
-        0
+        300
     ),
     "service_down": Alert(
         "critical",
         "validator.service is down.",
-        0
+        300
     ),
     "adnl_connection_failed": Alert(
         "high",