Updating snippet to new transport API (#6892)

Author: poornimanayar

tutorials/nservicebus-step-by-step/1-getting-started/Snippets/Core_9/Lesson1.cs

@@ -55,7 +55,7 @@ static async Task Steps(string[] args)
         #endregion
 
         #region LearningTransport
-        var transport = endpointConfiguration.UseTransport<LearningTransport>();
+        var transport = endpointConfiguration.UseTransport(new LearningTransport());
         #endregion
 
         #region Startup