avm2: Event phase should be counted from 1 in `valueOf`.

core/src/avm2/object/event_object.rs

@@ -108,10 +108,7 @@ impl<'gc> TObject<'gc> for EventObject<'gc> {
             mc,
             format!(
                 "[Event type=\"{}\" bubbles={} cancelable={} eventPhase={}]",
-                event_type,
+                event_type, bubbles, cancelable, phase
-                bubbles,
-                cancelable,
-                phase - 1
             ),
         )
         .into())