[css-fonts-4] Fix small typo

Author: litherum

css-fonts-4/Overview.bs

@@ -3828,7 +3828,7 @@ if all font style properties were set to their initial value.
 				If the value of 'font-style!!property' is ''italic'':
 
 				1. If the matching set includes faces with italic values containing the mapped value of ''italic'',
-					faces, then faces with italic values which do not include the desired italic mapped value are removed from the matching set.
+					then faces with italic values which do not include the desired italic mapped value are removed from the matching set.
 				2. Otherwise, italic values above the desired italic value are checked in ascending order followed by
 					italic values below the desired italic value, until 0 is hit. Only positive values of italic values are checked
 					in this stage.