Update build badge

Author: laurynas

README.md

@@ -2,7 +2,7 @@ Detect Language API Node.js Client
 ===
 
 [![npm version](https://badge.fury.io/js/detectlanguage.svg)](https://badge.fury.io/js/detectlanguage)
-[![Build Status](https://travis-ci.org/detectlanguage/detectlanguage-node.svg?branch=master)](https://travis-ci.org/detectlanguage/detectlanguage-node)
+[![Build Status](https://github.com/detectlanguage/detectlanguage-node/actions/workflows/main.yml/badge.svg)](https://github.com/detectlanguage/detectlanguage-node/actions)
 
 Node.js wrapper for the [Detect Language API](https://detectlanguage.com/).