[css-color-4] Allow all color spaces for interpolation method, fix #7907

Author: svgeesus

css-color-4/Overview.bs

@@ -4361,7 +4361,7 @@ Color Space for Interpolation</h3>
 
 	<pre class='prod'>
 		<dfn export>&lt;color-space></dfn> = &lt;rectangular-color-space> | &lt;polar-color-space>
-		<dfn export>&lt;rectangular-color-space></dfn> = ''srgb'' | ''srgb-linear'' | ''lab'' | ''oklab'' | ''xyz'' | ''xyz-d50'' | ''xyz-d65''
+		<dfn export>&lt;rectangular-color-space></dfn> = ''srgb'' | ''srgb-linear'' | ''display-p3'' | ''a98-rgb'' | ''prophoto-rgb'' | ''rec2020'' | ''lab'' | ''oklab'' | ''xyz'' | ''xyz-d50'' | ''xyz-d65''
 		<dfn export>&lt;polar-color-space></dfn> = ''hsl'' | ''hwb'' | ''lch'' | ''oklch''
 		<dfn export>&lt;hue-interpolation-method></dfn> = [ shorter | longer | increasing | decreasing ] hue
 		<dfn export id="color-interpolation-method">&lt;color-interpolation-method></dfn> = in [ <<rectangular-color-space>> | <<polar-color-space>> <<hue-interpolation-method>>? ]