Update README.rst

Co-authored-by: Dan Halbert <[email protected]>

Author: tannewt

README.rst

@@ -28,7 +28,7 @@ Dependencies
 =============
 This driver depends on:
 
-* `Adafruit CircuitPython 9+ <https://github.com/adafruit/circuitpython>`_
+* `Adafruit CircuitPython 9.0.0 and later <https://github.com/adafruit/circuitpython>`_
 
 Please ensure all dependencies are available on the CircuitPython filesystem.
 This is easily achieved by downloading