docs: fix vue example

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

@@ -0,0 +1,9 @@
+<script setup lang="ts">
+import { AvatarImage, type AvatarImageProps } from 'radix-vue'
+
+const props = defineProps<AvatarImageProps>()
+</script>
+
+<template>
+  <AvatarImage v-bind="props" class="h-full w-full object-cover" />
+</template>