Update powered-by.md

Change order.

docs/powered-by.md

@@ -5,6 +5,7 @@ or providing commercial products including Apache SkyWalking.
 
 1. 300.cn 中企动力科技股份有限公司 http://www.300.cn/
 1. 4399.com 四三九九网络股份有限公司. http://www.4399.com/
+1. 51mydao.com 买道传感科技（上海）有限公司 https://www.51mydao.com/
 1. 5i5j. 上海我爱我家房地产经纪有限公司 https://sh.5i5j.com/about/
 1. Alibaba Cloud, 阿里云, http://aliyun.com 
 1. Anxin Insurance. 安心财产保险有限责任公司 https://www.95303.com
@@ -69,7 +70,7 @@ or providing commercial products including Apache SkyWalking.
 1. Yinji(shenzhen)Network Technology Co.,Ltd. 印记. http://www.yinjiyun.cn/
 1. Yonghui Superstores Co., Ltd. 永辉超市 http://www.yonghui.com.cn
 1. Youzan.com 杭州有赞科技有限公司 http://www.youzan.com/
-1. 51mydao.com 买道传感科技（上海）有限公司 https://www.51mydao.com/
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 # User Cases
 ## Alibaba Cloud
 Support SkyWalking agents and formats in Tracing Analysis cloud service.