修复下载模板报错

src/views/Marketing/order/offlineOrder/batchRecord/firstStep/uploadStudent.vue

@@ -235,7 +235,7 @@ export default {
     getDowm() {
       let url =
         baseUrls.BASE_IMG_URL +
-        "oss/images/file/20220406/1649231575429.xlsx" +
+        "/oss/images/file/20220406/1649231575429.xlsx" +
         `?time=${this.$methodsTools.getNewTime()}`;
       let link = document.createElement("a");
       let fileName = "导入模板" + ".xlsx";