chore: enhance name

Author: aygalinc

projects/RabbitMQ.Client/Impl/Connection.cs

@@ -228,7 +228,7 @@ internal void TakeOver(Connection other)
         internal async ValueTask<IConnection> OpenAsync(CancellationToken cancellationToken)
         {
             cancellationToken.ThrowIfCancellationRequested();
-            Activity? _connectionActivity = RabbitMQActivitySource.OpenConnection(_frameHandler);
+            Activity? connectionActivity = RabbitMQActivitySource.OpenConnection(_frameHandler);
             try
             {
                 RabbitMqClientEventSource.Log.ConnectionOpened();
@@ -251,7 +251,7 @@ await _channel0.ConnectionOpenAsync(_config.VirtualHost, cancellationToken)
             }
             catch(Exception ex)
             {
-                _connectionActivity?.ReportException(ex);
+                connectionActivity?.ReportException(ex);
                 try
                 {
                     var ea = new ShutdownEventArgs(ShutdownInitiator.Library, Constants.InternalError, "FailedOpen");

projects/RabbitMQ.Client/Impl/RabbitMQActivitySource.cs

@@ -80,7 +80,7 @@ public static class RabbitMQActivitySource
             }
 
             Activity? connectionActivity =
-                s_connectionSource.StartRabbitMQActivity("rabbitmq connect", ActivityKind.Client);
+                s_connectionSource.StartRabbitMQActivity("connection open", ActivityKind.Client);
             connectionActivity?
                 .SetNetworkTags(frameHandler);
             return connectionActivity;