Update README.md

Author: hehehai

README.md

@@ -4,7 +4,7 @@
 
 [![Netlify Status](https://api.netlify.com/api/v1/badges/2051d1bc-3eae-4b90-a3c0-c46762a8a8f1/deploy-status)](https://app.netlify.com/sites/arco-vue-playground/deploys)
 
-🥳 [look here](arco-vue-playground.netlify.app)
+🥳 [look here](https://arco-vue-playground.netlify.app)
 
 > ‼️ arco-vue version support >= 2.27.0