Update README

Author: hnrkndrssn

README.md

@@ -7,7 +7,7 @@ Example Usage:
 
 ``` csharp
 var octopus = Require<OctopusClientPack>();
-var repo = octopus.GetRepository("http://server/octopusdeploy/api", "API-XXXXXXXXXXXXXXXXXXXXXXXXXXX");
+var repo = octopus.Initialise("http://server/octopusdeploy/api", "API-XXXXXXXXXXXXXXXXXXXXXXXXXXX");
 Console.WriteLine("Getting the current user...");
 var user = repo.Users.GetCurrent();
 Console.WriteLine("Current user: {0}", user.DisplayName);