add emoji text

Author: alisonmaher

css-color-adjust-1/Overview.bs

@@ -888,6 +888,8 @@ Properties Affected by Forced Colors Mode {#forced-colors-properties}
 	* 'color-scheme' computes to ''light dark''
 	* 'scrollbar-color' computes to ''scrollbar-color/auto''
 	* 'accent-color' computes to ''accent-color/auto''
+	* If 'font-variant-emoji' computes to ''font-variant-emoji/normal'' or ''font-variant-emoji/unicode'',
+		UAs should force any emoji on the page to its monochrome variant, if available.
 
 	UAs may further tweak these <a>forced colors mode</a> heuristics
 	to provide better user experience.