Fix: Fix errors in email notification for PID requests

coscine/issues#2354

src/NotificationBus/Controller/NotificationBusController.cs

@@ -109,8 +109,8 @@ namespace Coscine.Api.NotificationBus.Controllers
             {
                 language = _languageModel.GetById(new Guid(user.LanguageId.ToString())).Abbreviation;
             }
-            var template = (JObject)(action.Template[channelName][language]);
-
+            var template = JObject.Parse(action.Template[channelName][language].ToString(Newtonsoft.Json.Formatting.None));
+            
             var stubble = new StubbleBuilder()
               .Configure(settings =>
               {