Add comment explaining insertion of ruleset skin before default skin
Add comment explaining insertion of ruleset skin before default skin

Co-authored-by: Dean Herbert <1db828bcd41de75377dce59825af73ae7fca5651@ppy.sh>
peppy/osu,smoogipoo/osu,NeoAdonis/osu,peppy/osu-new,UselessToucan/osu,UselessToucan/osu,UselessToucan/osu,NeoAdonis/osu,smoogipoo/osu,NeoAdonis/osu,ppy/osu,ppy/osu,peppy/osu,peppy/osu,smoogipoo/osu,smoogipooo/osu,ppy/osu