Fix a minor typo in the documentation
// Pin A4 works on the Adafruit Metro M4 (if using the Adafruit RGB
// Matrix Shield, cut trace between CLK pads and run a wire to A4).
-//#define CLK 8 // USE THIS ON ADAFRUIT METRO M0 ir adapting to use Airlift, etc.
+//#define CLK 8 // USE THIS ON ADAFRUIT METRO M0 or adapting to use Airlift, etc.
#define CLK A4 // USE THIS ON METRO M4 (not M0)
#define OE 9
#define LAT 10
