feat: 虚拟滚动bug修复

src/views/demo/virtualList.vue

@@ -70,13 +70,13 @@ const getTransform = computed(() => {
 });
 
 onMounted(() => {
-    containerHeight.value = virtualListContainer.value.clientHeight;
+    containerHeight.value = containerRef.value.clientHeight;
     console.log('containerHeight容器高度为：', containerHeight.value);
 });
 </script>
 
 <style lang="scss" scoped>
-.virtual-list-container {
+.container {
     width: 100%;
     height: 100%;
     position: relative;