Update README.rst

Author: tdicola

README.rst

@@ -1,11 +1,11 @@
-Display drivers for Adafruit MicroPython.
+Display drivers for Adafruit CircuitPython.
 =========================================
 
 Port of display drivers from https://github.com/adafruit/micropython-adafruit-rgb-display
-to Adafruit MicroPython for use on Adafruit's SAMD21-based and other MicroPython
+to Adafruit CircuitPython for use on Adafruit's SAMD21-based and other CircuitPython
 boards.
 
-This driver depends on the Adafruit MicroPython BusDevice module being installed on the
+This driver depends on the Adafruit CircuitPython BusDevice module being installed on the
 board too: https://github.com/adafruit/Adafruit_MicroPython_BusDevice
 
 Note that this driver currently won't work on micropython.org firmware, instead