Fixed: HealthCheck level returns "Type" for Custom Scripts

Fixes #5803

src/NzbDrone.Core/Notifications/CustomScript/CustomScript.cs

@@ -121,7 +121,7 @@ namespace NzbDrone.Core.Notifications.CustomScript
             var environmentVariables = new StringDictionary();
 
             environmentVariables.Add("Radarr_EventType", "HealthIssue");
-            environmentVariables.Add("Radarr_Health_Issue_Level", nameof(healthCheck.Type));
+            environmentVariables.Add("Radarr_Health_Issue_Level", Enum.GetName(healthCheck.Type));
             environmentVariables.Add("Radarr_Health_Issue_Message", healthCheck.Message);
             environmentVariables.Add("Radarr_Health_Issue_Type", healthCheck.Source.Name);
             environmentVariables.Add("Radarr_Health_Issue_Wiki", healthCheck.WikiUrl.ToString() ?? string.Empty);