fixed f2f11faa from https://gitee.com/luoying_ace_admin/docs/pulls/10223

update zh-cn/application-dev/reference/js-service-widget-ui/js-service-widget-custom-props.md.
Signed-off-by: Nluoying_ace <luoying19@huawei.com>

zh-cn/application-dev/reference/js-service-widget-ui/js-service-widget-custom-props.md

@@ -35,6 +35,7 @@
 
 
 ```json
+// comp.json
 {
   "data": {
     "progress": {