[css-syntax-3] Missing phrase setting the type flag for percentage tokens. Fixes w3c#5483.

Author: tabatkins

css-syntax-3/Overview.bs

@@ -1117,7 +1117,7 @@ Consume a numeric token</h4>
 	Otherwise,
 	if the <a>next input code point</a> is U+0025 PERCENTAGE SIGN (%),
 	consume it.
-	Create a <<percentage-token>> with the same value as |number|,
+	Create a <<percentage-token>> with the same value and type flag as |number|,
 	and return it.
 
 	Otherwise,