docs(select-menu): update

docs/app/components/content/examples/select-menu/SelectMenuSearchTermExample.vue

@@ -0,0 +1,9 @@
+<script setup lang="ts">
+const searchTerm = ref('D')
+const items = ref(['Backlog', 'Todo', 'In Progress', 'Done'])
+const selected = ref('Backlog')
+</script>
+
+<template>
+  <USelectMenu v-model="selected" v-model:search-term="searchTerm" :items="items" />
+</template>