fixed bug in config file

config/controllers.yaml

@@ -11,7 +11,8 @@ controllers:
         pin: 6
     led_rgb:
         target: digilib.pin.LEDRGB
-        pins: [19,26]
+        pin_red: 19
+        pin_green: 26]
     debug_ctrl:
         target: digilib.pin.DebugPinController