pySim/utils_test.py: use proper shebang for this executable

Change-Id: I8ad843643b5a97d41a12f74e2ada49088a54974d
diff --git a/pySim/utils_test.py b/pySim/utils_test.py
index 8db04bd..5cdb55e 100644
--- a/pySim/utils_test.py
+++ b/pySim/utils_test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/pyton
+#!/usr/bin/env python3
 
 import unittest
 import utils