docs: fix vue example

examples/nuxt-example/components/ui/command/CommandGroup.vue

@@ -0,0 +1,29 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import type { ComboboxGroupProps } from 'radix-vue'
+import { ComboboxGroup, ComboboxLabel } from 'radix-vue'
+import { cn } from '@/lib/utils'
+
+const props = defineProps<ComboboxGroupProps & {
+  class?: HTMLAttributes['class']
+  heading?: string
+}>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+</script>
+
+<template>
+  <ComboboxGroup
+    v-bind="delegatedProps"
+    :class="cn('overflow-hidden p-1 text-foreground [&_[cmdk-group-heading]]:px-2 [&_[cmdk-group-heading]]:py-1.5 [&_[cmdk-group-heading]]:text-xs [&_[cmdk-group-heading]]:font-medium [&_[cmdk-group-heading]]:text-muted-foreground', props.class)"
+  >
+    <ComboboxLabel v-if="heading" class="px-2 py-1.5 text-xs font-medium text-muted-foreground">
+      {{ heading }}
+    </ComboboxLabel>
+    <slot />
+  </ComboboxGroup>
+</template>