docs: fix vue example

examples/nuxt-example/components/ui/number-field/NumberFieldInput.vue

@@ -0,0 +1,16 @@
+<script setup lang="ts">
+import { NumberFieldInput } from 'radix-vue'
+import type { HTMLAttributes } from 'vue'
+import { cn } from '@/lib/utils'
+
+const props = defineProps<{
+  class?: HTMLAttributes['class']
+}>()
+</script>
+
+<template>
+  <NumberFieldInput
+    data-slot="input"
+    :class="cn('flex h-9 w-full rounded-md border border-input bg-transparent py-1 text-sm text-center shadow-sm transition-colors placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50', props.class)"
+  />
+</template>