[css-color-hdr] Prevent color() links from pointing to CSS Color 5

Author: cdoublev

css-color-hdr-1/Overview.bs

@@ -924,7 +924,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	Specifying Predefined and Custom Color Spaces: the ''color()'' Function
 </h2>
 
-	The ''color()'' function allows a color to be specified
+	The <dfn>color()<dfn> function allows a color to be specified
 	in a particular, given [=color space=]
 	(rather than the implicit sRGB color space that most of the other color functions operate in).