docs: fix vue example

examples/nuxt-example/components/ui/dropdown-menu/DropdownMenu.vue

@@ -0,0 +1,14 @@
+<script setup lang="ts">
+import { DropdownMenuRoot, type DropdownMenuRootEmits, type DropdownMenuRootProps, useForwardPropsEmits } from 'radix-vue'
+
+const props = defineProps<DropdownMenuRootProps>()
+const emits = defineEmits<DropdownMenuRootEmits>()
+
+const forwarded = useForwardPropsEmits(props, emits)
+</script>
+
+<template>
+  <DropdownMenuRoot v-bind="forwarded">
+    <slot />
+  </DropdownMenuRoot>
+</template>