fixed documentation regression

README.md

@@ -1,7 +1,7 @@
 # 3d-tiles-renderer
 
 [![npm version](https://img.shields.io/npm/v/3d-tiles-renderer.svg?style=flat-square)](https://www.npmjs.com/package/3d-tiles-renderer)
-[![travis build](https://img.shields.io/travis/com/NASA-AMMOS/3DTilesRendererJS/master.svg?style=flat-square)](https://travis-ci.com/NASA-AMMOS/3DTilesRendererJS)
+[![build](https://img.shields.io/github/workflow/status/NASA-AMMOS/3DTilesRendererJS/Node.js%20CI?style=flat-square&label=build)](https://github.com/NASA-AMMOS/3DTilesRendererJS/actions)
 [![lgtm code quality](https://img.shields.io/lgtm/grade/javascript/g/NASA-AMMOS/3DTilesRendererJS.svg?style=flat-square&label=code-quality)](https://lgtm.com/projects/g/NASA-AMMOS/3DTilesRendererJS/)
 
 ![](./images/header.png)