Fix typo

Author: Psychpsyo

css-lists-3/Overview.bs

@@ -1501,7 +1501,7 @@ Outputting Counters: the ''counter()'' and ''counters()'' functions</h3>
 		which can be useful for other properties to reference.
 		For example, using 'order' to put an element between two other specific elements
 		currently requires you to explicitly put 'order' on every element before and/or after the desired insertion point.
-		If you can set the 'order' value of everything to a counter, tho,
+		If you can set the 'order' value of everything to a counter though,
 		you can more easily insert an element into an arbitrary spot between two others.
 
 		Other use-cases involve nested or sibling elements with transforms that are meant to be slightly different from each other.