docs: add smallsticker

README.zh-CN.md

@@ -221,6 +221,10 @@ Detailed changes for each release are documented in the [release notes](https://
 
 [Buy me a coffee](https://www.buymeacoffee.com/Pan)
 
+## 购买贴纸
+
+你也可以通过 购买[官方授权的贴纸](https://smallsticker.com/product/vue-element-admin) 的方式来支持 vue-element-admin - 每售出一张贴纸，我们将获得 2 元的捐赠。
+
 ## Browsers support
 
 Modern browsers and Internet Explorer 10+.