Docs: fix untranslated parts (#23709)

docs/api/zh/animation/AnimationObjectGroup.html

@@ -43,7 +43,7 @@
 
 		<h3>[property:Boolean isAnimationObjectGroup]</h3>
 		<p>
-			Read-only flag to check if a given object is of type [name].
+			只读标志，以检查给定对象是否属于 AnimationObjectGroup 类型。
 		</p>