Circuit_Playground_Bluefruit_NeoPixel_Controller/NeoPixel_Animator.py needs updating

[Dan Halbert]

Circuit_Playground_Bluefruit_NeoPixel_Controller/NeoPixel_Animator.py is out of date with respect to the revised adafruit_led_animation library. It's used in this guide:

https://learn.adafruit.com/circuit-playground-bluefruit-neopixel-animation-and-color-remote-control/circuitpython-setup-and-code

tagging @kattni @rhooper

Issue encountered by xtrude64 (discord).

[Kattni]

Fixed by #1154