Enable multizone support on Strix 513IH

After asusctl -h was fixed to display all help information, I found a way to test if multizone support is suported on a laptop:

1. Run asusctl led-mode multi-static -a ffffff -b 0000A6 -c 00A600 -d A60000
2. Look at your keyboard and verify if you have 4 colour stripes: white, blue, green and red.

And it turned out my laptop, the ROG Strix 513IH, does support it, so I'm amending the led-config.

I've also fixed a typo in a comment.