Edit README.md

Edit file for active voice.

Author: Amanda Butler

APIs_Drivers/DigitalInOut_ex_1/README.md

@@ -1,3 +1,6 @@
 # DigitalInOut example
 
-The DigitalInOut API can be used to both read and write a digital pin. Use the output() and input() function calls to switch modes and then use just like you would DigitalIn or DigitalOut.
+You can use the DigitalInOut API to both read and write to a digital pin:
+
+1. Use the `output()` and `input()` function calls to switch modes.
+1. Use just like you would DigitalIn or DigitalOut.