Update standalone docs as out of date with current API

WireMock-as-a-standalone-process.md

@@ -23,9 +23,12 @@ class Program
     static void Main(string[] args)
     {
         // see source code for all the possible properties
-        var settings = new FluentMockServerSettings { };
-        bool allowPartialMapping = true;
-        StandAloneApp.Start(settings, allowPartialMapping);
+        var settings = new FluentMockServerSettings
+            {
+                AllowPartialMapping=true,
+                StartAdminInterface=true
+            };
+        StandAloneApp.Start(settings);
 
         Console.WriteLine("Press any key to stop the server");
         Console.ReadKey();