Fix invocation python2 -> python3

Change-Id: Ic78da9c03e99f59d142c93394051bbc2751f0205
diff --git a/pySim-read.py b/pySim-read.py
index 3e19a02..6608556 100755
--- a/pySim-read.py
+++ b/pySim-read.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 #
 # Utility to display some informations about a SIM card