Add sample nanoff update command in console (#89)

***NO_CI***

Author: ikivanc

nanoFirmwareFlasher/Program.cs

@@ -108,6 +108,8 @@ private static void CheckVersion()
             {
                 Console.ForegroundColor = ConsoleColor.DarkYellow;
                 Console.WriteLine("** There is a new version available, update is recommended **");
+                Console.WriteLine("** You should consider updating via the 'dotnet tool update -g nanoff' command **");
+                Console.WriteLine("** If you have it installed on a specific path please check the instructions here: https://git.io/JiU0C **");
                 Console.ForegroundColor = ConsoleColor.White;
             }
         }