Log Notifiarr errors as warnings

src/NzbDrone.Core/Notifications/Notifiarr/NotifiarrProxy.cs

@@ -50,17 +50,17 @@ namespace NzbDrone.Core.Notifications.Notifiarr
                 switch ((int)responseCode)
                 {
                     case 401:
-                        _logger.Error("HTTP 401 - API key is invalid");
+                        _logger.Warn("HTTP 401 - API key is invalid");
                         throw new NotifiarrException("API key is invalid");
                     case 400:
                         // 400 responses shouldn't be treated as an actual error because it's a misconfiguration
                         // between Radarr and Notifiarr for a specific event, but shouldn't stop all events.
-                        _logger.Error("HTTP 400 - Unable to send notification. Ensure Radarr Integration is enabled & assigned a channel on Notifiarr");
+                        _logger.Warn("HTTP 400 - Unable to send notification. Ensure Radarr Integration is enabled & assigned a channel on Notifiarr");
                         break;
                     case 502:
                     case 503:
                     case 504:
-                        _logger.Error("Unable to send notification. Service Unavailable");
+                        _logger.Warn("Unable to send notification. Service Unavailable");
                         throw new NotifiarrException("Unable to send notification. Service Unavailable", ex);
                     case 520:
                     case 521: