Add https://www.wochu.cn to powered-by list (#2050)

* Update powered-by.md

* Update powered-by.md

Adjust order. And highlight order.

docs/powered-by.md

 # Powered by Apache SkyWalking
-This page documents an alphabetical list of institutions that are using Apache SkyWalking for research and production,
+This page documents an **alphabetical list** of institutions that are using Apache SkyWalking for research and production,
 or providing commercial products including Apache SkyWalking.
 
 
@@ -50,15 +50,18 @@ or providing commercial products including Apache SkyWalking.
 1. Tsfinance.com 重庆宜迅联供应链科技有限公司 https://www.tsfinance.com.cn/
 1. VBill Payment Co., LTD. 随行付. https://www.vbill.cn/
 1. Weier. 广州文尔软件科技有限公司. https://www.site0.cn
+1. Wochu. 我厨买菜. https://www.wochu.cn
 1. Xiaomi. 小米. https://www.mi.com/en/
 1. Yiguo. 易果生鲜. http://www.yiguo.com/
 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
 
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 # User Cases
 ## ke.com
 ### Deployment Configuration
 Three CentOs Machine(32 CPUs, 64G RAM, 1.3T Disk) for Collector Server
 Three ElasticSearch(Version 6.4.2, 40 CPUs, 96G RAM, 7T Disk) Nodes for Storage
 ### Performance
-Support 60+ Instances, Over 300k Calls Per Minute, Over 50k Spans Per Second
\ No newline at end of file
+Support 60+ Instances, Over 300k Calls Per Minute, Over 50k Spans Per Second