doc: add Playground to README.md

README.md

@@ -9,9 +9,9 @@
 
 Please use all lowercase `resvg-js` when referencing project names.
 
-**💖 🙏[Sponsoring me](#sponsor)**
+## Playground
 
-> Your sponsorship means a lot to me. It will help me sustain my projects actively and make more of my ideas come true. Much appreciated!
+https://resvg-js.vercel.app
 
 ## Features
 
@@ -27,12 +27,6 @@ Please use all lowercase `resvg-js` when referencing project names.
 - Cross-platform support, including [Apple M Chips](https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/).
 - Support for running as native addons in Deno.
 
-## Sponsor
-
-Alipay(支付宝)
-
-<img width="260" src="https://user-images.githubusercontent.com/2784308/275749798-dcecb901-6a44-46f6-aab3-98635664719e.jpeg">
-
 ## Installation
 
 ### Node.js