Update GetTypeEx2.cs (dotnet#5424)

Fix dotnet#5414.

Author: antonfirsov

samples/snippets/csharp/VS_Snippets_CLR_System/system.object.gettype/cs/GetTypeEx2.cs

@@ -16,7 +16,7 @@ public static void Main()
          else if (t.Equals(typeof(int)))
             Console.WriteLine("{0} is a 32-bit integer.", value);
          else if (t.Equals(typeof(long)))
-            Console.WriteLine("{0} is a 32-bit integer.", value);
+            Console.WriteLine("{0} is a 64-bit integer.", value);
          else if (t.Equals(typeof(double)))
             Console.WriteLine("{0} is a double-precision floating point.",
                               value);