Update the pixel_shader usage of OnDiskBitmap#25

FoamyGuy merged 2 commits intoadafruit:mainadafruit/Adafruit_CircuitPython_turtle:mainfrom

lesamouraipourpre:ondiskbitmap-changeslesamouraipourpre/Adafruit_CircuitPython_turtle:ondiskbitmap-changesCopy head branch name to clipboard