update docs

README.md

@@ -19,7 +19,7 @@
 GROWI 
 ===========
 
-[![wercker status](https://app.wercker.com/status/595b761d0e26796ddb304679f7bf27de/s/master "wercker status")](https://app.wercker.com/project/byKey/595b761d0e26796ddb304679f7bf27de)
+[![Actions Status](https://github.com/weseek/growi/workflows/Node%20CI/badge.svg)](https://github.com/weseek/growi/actions)
 [![dependencies status](https://david-dm.org/weseek/growi.svg)](https://david-dm.org/weseek/growi)
 [![devDependencies Status](https://david-dm.org/weseek/growi/dev-status.svg)](https://david-dm.org/weseek/growi?type=dev)
 [![docker pulls](https://img.shields.io/docker/pulls/weseek/growi.svg)](https://hub.docker.com/r/weseek/growi/)