Fixing the arduino nano device definition.

Author: CreatingNull

CHANGES.rst

@@ -11,6 +11,8 @@ Version 0.4.0
 * Device definitions are shifted into private modules within a
   devices packages. The intended API avoids having to be aware of this
   complexity.
+* Correcting a mistake in the arduino_nano device definition.
+  This had 9x pins defined where only 8x exist on this device.
 
 Version 0.3.0
 -------------

uoshardware/devices/_arduino.py

@@ -102,7 +102,6 @@
         5: Pin(adc_in=True),
         6: Pin(adc_in=True),
         7: Pin(adc_in=True),
-        8: Pin(adc_in=True),
     },
     aux_params={"default_baudrate": 115200},
 )