Silver Kayle update.

This isn't much of a visual update, but Silver Kayle's abilities have the colours of normal Kayle. The R should be blue instead of red, E should be white and blue flames instead of red and orange, and the ult should be silver instead of gold. Not many people own Silver Kayle, but it would be a really nice touch to the rare skin and would fit more with the theme. It also would be fairly easy to change.