docs: fix vue example

examples/nuxt-example/components/ui/breadcrumb/Breadcrumb.vue

@@ -0,0 +1,13 @@
+<script lang="ts" setup>
+import type { HTMLAttributes } from 'vue'
+
+const props = defineProps<{
+  class?: HTMLAttributes['class']
+}>()
+</script>
+
+<template>
+  <nav aria-label="breadcrumb" :class="props.class">
+    <slot />
+  </nav>
+</template>