docs: fix vue example

examples/nuxt-example/components/ui/navigation-menu/NavigationMenuIndicator.vue

@@ -0,0 +1,24 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { NavigationMenuIndicator, type NavigationMenuIndicatorProps, useForwardProps } from 'radix-vue'
+import { cn } from '@/lib/utils'
+
+const props = defineProps<NavigationMenuIndicatorProps & { class?: HTMLAttributes['class'] }>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+
+const forwardedProps = useForwardProps(delegatedProps)
+</script>
+
+<template>
+  <NavigationMenuIndicator
+    v-bind="forwardedProps"
+    :class="cn('top-full z-[1] flex h-1.5 items-end justify-center overflow-hidden data-[state=visible]:animate-in data-[state=hidden]:animate-out data-[state=hidden]:fade-out data-[state=visible]:fade-in', props.class)"
+  >
+    <div class="relative top-[60%] h-2 w-2 rotate-45 rounded-tl-sm bg-border shadow-md" />
+  </NavigationMenuIndicator>
+</template>