Clarify leading zero handling in time display

Per guide feedback where a user wanted suppressed zero on times from 01:00 to 09:59. Guide will be augmented per Ladyada to allow the user to select which behavior they want just by commenting out a line and uncommenting out the desired behavior Default is the code as written that does not suppress a zero.

Author: TheKitty

Digital_Clock_with_CircuitPython/code.py

@@ -58,7 +58,9 @@ def clock_conversion(h, m, set_brightness):
     hour_12 = h if h <= 12 else h - 12
     if hour_12 == 0:
         hour_12 = 12
-    display.print(f"{(hour_12):02}:{m:02}")
+    display.print(f"{(hour_12):02}:{m:02}")  # Use for leading zero re. 09:35
+    # display.print(f"{hour_12:2}:{m:02}")   # uncomment to suppress leading zero 
+    #                                        #  (shows 1:00 instead of 01:00)
     display.ampm = am_pm
     if set_brightness:
         if awake_hours[0] <= h <= awake_hours[1] - 1: