docs: fix vue example

examples/nuxt-example/components/ui/avatar/Avatar.vue

@@ -0,0 +1,21 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { AvatarRoot } from 'radix-vue'
+import { type AvatarVariants, avatarVariant } from '.'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(defineProps<{
+  class?: HTMLAttributes['class']
+  size?: AvatarVariants['size']
+  shape?: AvatarVariants['shape']
+}>(), {
+  size: 'sm',
+  shape: 'circle',
+})
+</script>
+
+<template>
+  <AvatarRoot :class="cn(avatarVariant({ size, shape }), props.class)">
+    <slot />
+  </AvatarRoot>
+</template>