Update README.md

remove extra 'tutorials' from URL

Author: GoFightNguyen

dotnet-visual-studio/README.md

@@ -43,6 +43,6 @@ time opening it in order to get the .NET RabbitMQ dependency from NuGet.
 - 6_RPCServer
 - 6_RPCClient
 
-#### [Tutorial 7: Publisher Confirms](https://www.rabbitmq.com/tutorials/tutorial-seven-dotnet.html)
+#### [Tutorial 7: Publisher Confirms](https://www.rabbitmq.com/tutorial-seven-dotnet.html)
 
 - 7_PublisherConfirms