[css-fonts-4] Add left and right to font-style descriptor, #9392

Author: svgeesus

css-fonts-4/Overview.bs

@@ -3102,7 +3102,7 @@ Font property descriptors: the 'font-style!!descriptor', 'font-weight!!descripto
 
 	<pre class='descdef'>
 	Name: font-style
-	Value: auto | normal | italic | oblique [ <<angle [-90deg,90deg]>>{1,2} ]?
+	Value: auto | normal | italic | left | right | oblique [ <<angle [-90deg,90deg]>>{1,2} ]?
 	For: @font-face
 	Initial: auto
 	</pre>