docs: fix vue example

examples/nuxt-example/components/ui/select/SelectItemText.vue

@@ -0,0 +1,11 @@
+<script setup lang="ts">
+import { SelectItemText, type SelectItemTextProps } from 'radix-vue'
+
+const props = defineProps<SelectItemTextProps>()
+</script>
+
+<template>
+  <SelectItemText v-bind="props">
+    <slot />
+  </SelectItemText>
+</template>