Fixed IS31FL3731 LEDs on keybow 2040

boards/pimoroni/keybow_2040/code.py

@@ -1,8 +1,18 @@
+from is31fl3731_pixelbuf import Keybow2040Leds
 from keybow_2040 import Keybow2040
 
+from kmk.extensions.rgb import RGB, AnimationModes
 from kmk.keys import KC
 
+rgb_ext = RGB(
+    pixel_pin=0,
+    pixels=Keybow2040Leds(16),
+    num_pixels=16,
+    animation_mode=AnimationModes.BREATHING_RAINBOW,
+)
+
 keybow = Keybow2040()
+keybow.extensions = [rgb_ext]
 
 # fmt: off
 keybow.keymap = [