Fix the comment

Author: lukebakken

projects/RabbitMQ.Client/client/impl/AsyncConsumerWorkService.cs

@@ -16,8 +16,7 @@ public void Schedule<TWork>(ModelBase model, TWork work) where TWork : Work
             /*
              * rabbitmq/rabbitmq-dotnet-client#841
              * https://docs.microsoft.com/en-us/dotnet/api/system.collections.concurrent.concurrentdictionary-2.getoradd
-             * Note that the value delegate is not atomic but instances of this class are not meant to be used by
-             * multiple threads.
+             * Note that the value delegate is not atomic but the Schedule method will not be called concurrently.
              */
             WorkPool workPool = _workPools.GetOrAdd(model, _startNewWorkPoolFunc);
             workPool.Enqueue(work);

projects/RabbitMQ.Client/client/impl/ConsumerWorkService.cs

@@ -15,8 +15,7 @@ public void AddWork(IModel model, Action fn)
             /*
              * rabbitmq/rabbitmq-dotnet-client#841
              * https://docs.microsoft.com/en-us/dotnet/api/system.collections.concurrent.concurrentdictionary-2.getoradd
-             * Note that the value delegate is not atomic but instances of this class are not meant to be used by
-             * multiple threads.
+             * Note that the value delegate is not atomic but the AddWork method will not be called concurrently.
              */
             WorkPool workPool = _workPools.GetOrAdd(model, _startNewWorkPoolFunc);
             workPool.Enqueue(fn);