fix(init): add new parameter to C# example (#1831)

packages/aws-cdk/lib/init-templates/app/csharp/src/HelloCdk/HelloStack.cs

@@ -20,15 +20,15 @@ public HelloStack(App parent, string name, IStackProps props) : base(parent, nam
                 DisplayName = "My First Topic Yeah"
             });
 
-            topic.SubscribeQueue(queue);
+            topic.SubscribeQueue(queue, null);
 
             // You can also define your own constructs and use them in your stack.
             HelloConstruct hello = new HelloConstruct(this, "Buckets", new HelloConstructProps()
             {
                 BucketCount = 5
             });
 
-            // Create a new user with read access to the HelloConstruct resource.         
+            // Create a new user with read access to the HelloConstruct resource.
             User user = new User(this, "MyUser", new UserProps());
             hello.GrantRead(user);
         }