fix namespace

src/Umbraco.Core/Events/RolesEventArgs.cs

@@ -1,6 +1,6 @@
 using System;
 
-namespace Umbraco.Core.Services
+namespace Umbraco.Core.Events
 {
     public class RolesEventArgs : EventArgs
     {
@@ -13,4 +13,4 @@ namespace Umbraco.Core.Services
         public int[] MemberIds { get; set; }
         public string[] Roles { get; set; }
     }
-}
+}