docs: useUpdate add new demo

Author: NelsonYong

packages/hooks/src/useUpdate/demo/demo1.vue

@@ -0,0 +1,27 @@
+<template>
+  <div>
+    <div>count:{{ count }}</div>
+    <vhp-button type="vhp-button" @click="() => count++">Add</vhp-button>
+    <vhp-button type="vhp-button" style="margin-left:16px" @click="() => setUpdate()"
+    >刷新页面</vhp-button
+    >
+  </div>
+</template>
+
+<script lang="ts" setup>
+  import { watch, ref, onMounted } from 'vue'
+  import { useUpdate } from 'vue-hooks-plus'
+
+  const { update, setUpdate } = useUpdate()
+  const count = ref(0)
+
+  onMounted(() => {
+    console.log('我被创建了')
+  })
+
+  watch(update, () => {
+    location.hash = `${Date.now()}`
+  })
+</script>
+
+<style scoped lang="less"></style>

packages/hooks/src/useUpdate/index.md

@@ -18,6 +18,14 @@ map:
   desc="通过改变ref的对象，用watch进行监听动态渲染页面">
 </demo>
 
+### 刷新页面
+
+<demo src="./demo/demo1.vue"
+  language="vue"
+  title="基本用法"
+  desc="改变hash值刷新页面">
+</demo>
+
 
 ## API