add Sinolink Securities to powered-by.md (#2484)

docs/powered-by.md

@@ -59,6 +59,7 @@ or providing commercial products including Apache SkyWalking.
 1. Qk365.com 上海青客电子商务有限公司 https://www.qk365.com
 1. Rongjinbao. 深圳融金宝互联网金融服务有限公司. http://www.rjb777.com
 1. Shouqi Limousine & chauffeur Group 首约科技(北京)有限公司. https://www.01zhuanche.com/
+1. Sinolink Securities Co.,Ltd. 国金证券佣金宝 http://www.yongjinbao.com.cn/
 1. Source++ https://sourceplusplus.com
 1. StartDT 奇点云 https://www.startdt.com/
 1. Successchannel 苏州渠成易销网络科技有限公司. http://www.successchannel.com