refactor: update return statement to use array spread syntax

Author: kamilbaczek

Chapter-3-microservice-extraction/Fitnet.Common/Fitnet.Common.IntegrationTestsToolbox/TestEngine/EventBus/EventBusExtensions.cs

@@ -54,6 +54,6 @@ public static async Task<IEnumerable<IReceivedMessage<TMessage>>> WaitToConsumeM
             }
         }
 
-        return testHarness.Consumed!.Select<TMessage>(cancellationToken)!.ToList();
+        return [.. testHarness.Consumed!.Select<TMessage>(cancellationToken)];
     }
 }