[css-pseudo-4] Clarify that special currentColor behavior is only for 'color' per dbaron's comment. #2850

Author: fantasai

css-pseudo-4/Overview.bs

@@ -628,7 +628,7 @@ Painting the Highlight</h3>
   over the <a>highlight overlay</a> backgrounds
   (and outlines, if any)
   using its own 'color',
-  with ''currentColor'' representing the 'color'
+  with ''currentColor'' on its 'color' property representing the 'color'
   of the next <a>highlight pseudo-element</a> layer below,
   falling back finally to that of the <a>originating element</a>
   (the colors that would otherwise be used).