修改赠送优惠券的弹框

src/views/coupon/coupon/giveCoupon.vue

 <template>
   <div class="app-container">
-    <el-dialog :visible.sync="giveOpen" width="1000px" append-to-body>
+    <el-dialog :visible.sync="giveOpen" width="1000px" append-to-body title="赠送优惠券">
       <el-form :model="queryParams" size="small" :inline="true" label-width="68px">
         <el-form-item label="手机号" >
           <el-input v-model="queryParams.userInfo" placeholder="请输入手机号" clearable @keyup.enter.native="handleQuery" />