Change OTel attribute messaging.operation to messaging.operation.type

Author: Isaiah Inuwa

projects/RabbitMQ.Client/Impl/RabbitMQActivitySource.cs

@@ -15,7 +15,7 @@ public static class RabbitMQActivitySource
         // https://opentelemetry.io/docs/specs/semconv/messaging/messaging-spans/#messaging-attributes
         internal const string MessageId = "messaging.message.id";
         internal const string MessageConversationId = "messaging.message.conversation_id";
-        internal const string MessagingOperation = "messaging.operation";
+        internal const string MessagingOperation = "messaging.operation.type";
         internal const string MessagingSystem = "messaging.system";
         internal const string MessagingDestination = "messaging.destination.name";
         internal const string MessagingDestinationRoutingKey = "messaging.rabbitmq.destination.routing_key";