Update example to use cc and bcc

Author: Rich Leland

examples/transmissions/send_transmission.py

@@ -18,6 +18,8 @@
             }
         }
     ],
+    cc=['[email protected]'],
+    bcc=['[email protected]'],
     html='<p>Hello {{name}}</p>',
     text='Hello {{name}}',
     from_email='[email protected]',