test: update transition test

Author: tangjinzhou

components/_util/transition.tsx

@@ -1,5 +1,5 @@
 import type { BaseTransitionProps, CSSProperties, Ref } from 'vue';
-import { onBeforeUpdate } from 'vue';
+import { onUpdated } from 'vue';
 import { getCurrentInstance } from 'vue';
 import { defineComponent, nextTick, Transition as T, TransitionGroup as TG } from 'vue';
 
@@ -52,7 +52,7 @@ if (process.env.NODE_ENV === 'test') {
     inheritAttrs: false,
     setup(_props, { slots, attrs }) {
       const instance = getCurrentInstance();
-      onBeforeUpdate(() => {
+      onUpdated(() => {
         const child = instance.subTree.children[0];
         if (child && child.dirs && child.dirs[0]) {
           const value = child.dirs[0].value;