docs: fix vue example

examples/nuxt-example/components/ui/collapsible/CollapsibleContent.vue

@@ -0,0 +1,11 @@
+<script setup lang="ts">
+import { CollapsibleContent, type CollapsibleContentProps } from 'radix-vue'
+
+const props = defineProps<CollapsibleContentProps>()
+</script>
+
+<template>
+  <CollapsibleContent v-bind="props" class="overflow-hidden transition-all data-[state=closed]:animate-collapsible-up data-[state=open]:animate-collapsible-down">
+    <slot />
+  </CollapsibleContent>
+</template>