Update comment variable name.

Author: tdicola

examples/simpletest.py

@@ -42,7 +42,7 @@
 while True:
     packet = rfm9x.receive()
     # Optionally change the receive timeout from its default of 0.5 seconds:
-    #packet = rfm69.receive(timeout_s=5.0)
+    #packet = rfm9x.receive(timeout_s=5.0)
     # If no packet was received during the timeout then None is returned.
     if packet is None:
         print('Received nothing! Listening again...')