add KubeSphere in powered-by list (#4504)

* add KubeSphere in powered-by list
Signed-off-by: NFeynmanZhou <pengfeizhou@yunify.com>

* move KubeSphere alphabetically
Signed-off-by: NFeynmanZhou <pengfeizhou@yunify.com>

docs/powered-by.md

@@ -70,6 +70,7 @@ or providing commercial products including Apache SkyWalking.
 1. juhaokan 聚好看科技股份有限公司 https://www.juhaokan.org/
 1. Ke.com. 贝壳找房. https://www.ke.com
 1. Keking.cn 凯京集团. http://www.keking.cn
+1. KubeSphere https://kubesphere.io
 1. JoinTown. 九州通医药集团 http://www.jztey.com/
 1. Lagou.com. 拉勾. https://www.lagou.com/
 1. laocaibao. 上海证大爱特金融信息服务有限公司 https://www.laocaibao.com/
@@ -150,6 +151,7 @@ or providing commercial products including Apache SkyWalking.
 1. zhaopin.com 智联招聘 https://www.zhaopin.com/
 1. zjs.com.cn 北京宅急送快运股份有限公司 http://www.zjs.com.cn/
 
+
 # Use Cases
 ## Alibaba and Alibaba Cloud
 Alibaba products including [Cloud DevOps product](https://cn.aliyun.com/product/yunxiao) are under SkyWalking monitoring.