[css-view-transitions-2] typo: if => of

Author: tuankiet65

css-view-transitions-2/Overview.bs

@@ -453,7 +453,7 @@ The {{CSSViewTransitionRule}} represents a ''@view-transition'' rule.
 
 For simple pages, with a single view transition, setting the ''view-transition-name'' property on participating elements should be sufficient.
 However, in more complex scenarios, the author might want to declare various view transitions, and only run one of them simultaneously.
-For example, sliding the whole page when clicking on the navigation bar, and sorting a list when one if its items is dragged.
+For example, sliding the whole page when clicking on the navigation bar, and sorting a list when one of its items is dragged.
 
 To make sure each view transition only captures what it needs to, and different transitions don't interfere with each other,
 this spec introduces the concept of [=active types=], alongside the '':active-view-transition'' and '':active-view-transition-type()'' pseudo-classes.