doc: add sponsor

Author: guangzhengli

README.md

@@ -63,6 +63,7 @@ k8s 作为云原生时代的操作系统，学习它的必要性不言而喻，
   - [Dashboard](#dashboard)
     - [kubernetes dashboard](#kubernetes-dashboard)
     - [K9s](#k9s)
+  - [Sponsor](#sponsor)
   - [Star History](#star-history)
 
 # kubernetes tutorials
@@ -2047,6 +2048,12 @@ minikube dashboard
 
 ![83ybd4](https://cdn.jsdelivr.net/gh/guangzhengli/PicURL@master/uPic/83ybd4.png)
 
+## Sponsor
+
+如果这份教程对你有帮助，欢迎请作者喝杯咖啡。
+https://guangzhengli.com/sponsors
+
+
 ## Star History
 
 [![Star History Chart](https://api.star-history.com/svg?repos=guangzhengli/k8s-tutorials&type=Date)](https://star-history.com/#guangzhengli/k8s-tutorials&Date)