修改bug

src/views/productionPlan/components/newFactoryProductionScheduling.vue

@@ -27,6 +27,7 @@
           start-placeholder="计划开始时间"
           end-placeholder="计划结束时间"
           @change="handleDateChange"
+          :append-to-body="false"
         ></el-date-picker>
       </template>
     </projectGantt>