fix: add missing import to <IonAnimation>

Author: danielroe

src/runtime/components/IonAnimation.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { onMounted, onBeforeUnmount } from 'vue'
+import { onMounted, onBeforeUnmount, ref } from 'vue'
 import {
   createAnimation,
   Animation,