Fixed asynchronous exception catching bug of sending.

src/DotNetCore.CAP/Processor/IDispatcher.Default.cs

@@ -58,18 +58,18 @@ namespace DotNetCore.CAP.Processor
                 while (!_publishedMessageQueue.IsCompleted)
                 {
                     if (_publishedMessageQueue.TryTake(out var message, 3000, _cts.Token))
-                    {
-                        try
                     {
                         Task.Run(async () =>
+                        {
+                            try
                             {
                                 await _sender.SendAsync(message);
-                            });
                             }
                             catch (Exception ex)
                             {
                                 _logger.LogError(ex, $"An exception occurred when sending a message to the MQ. Topic:{message.Name}, Id:{message.Id}");
                             }
+                        });
                     }
                 }
             }