chore(build-status): replace Jenkins badge with GitHub Actions

Closes #2229

Author: char0n

README.md

@@ -1,6 +1,6 @@
 # Swagger Client <img src="https://raw.githubusercontent.com/swagger-api/swagger.io/wordpress/images/assets/SW-logo-clr.png" height="50" align="right">
 
-[![Build Status](https://jenkins.swagger.io/view/OSS%20-%20JavaScript/job/oss-swagger-js-master/badge/icon?subject=jenkins%20build)](https://jenkins.swagger.io/view/OSS%20-%20JavaScript/job/oss-swagger-js-master/)
+![Build Status](https://github.com/swagger-api/swagger-js/actions/workflows/nodejs.yml/badge.svg)
 
 **Swagger Client** is a JavaScript module that allows you to fetch, resolve, and interact with Swagger/OpenAPI documents.