Update example to have Monday at index 0

Matches correct behavior of weekday number, with Monday as 0

Author: tekktrik

examples/ds3231_simpletest.py

@@ -14,7 +14,7 @@
 rtc = adafruit_ds3231.DS3231(i2c)
 
 # Lookup table for names of days (nicer printing).
-days = ("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday")
+days = ("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday")
 
 
 # pylint: disable-msg=using-constant-test