更新 'docs/zh/pc/4.md'

docs/zh/pc/4.md

@@ -392,7 +392,9 @@ Note: WebPay is available for currency USD and country code CL.
  
 修改测试机器hosts,添加如下两条信息
  
-114.80.87.249 account.preview.n.xiaomi.net
+114.80.87.249 account.preview.n.xiaomi.net 
+
+
 114.80.87.249 api.account.preview.n.xiaomi.net