Merge pull request #668 from adafruit/TheKitty-patch-29

Update cpx-expressive-midi-controller.py

Author: TheKitty

Circuit_Playground_Express_USB_MIDI/cpx-expressive-midi-controller.py

@@ -11,7 +11,7 @@
 
 ### copy this file to CPX as code.py
 
-### MIT License
+### MIT License.
 
 ### Copyright (c) 2019 Kevin J. Walters