docs: update CI badge

Author: DiegoRBaquero

README.md

@@ -1,7 +1,7 @@
 # Bencode
 [![npm](https://img.shields.io/npm/v/bencode.svg?style=flat-square)](https://npmjs.com/bencode)
 [![npm downloads](https://img.shields.io/npm/dm/bencode.svg?style=flat-square)](https://npmjs.com/bencode)
-[![build status](https://img.shields.io/travis/themasch/node-bencode/master.svg?style=flat-square)](https://travis-ci.org/themasch/node-bencode)
+[![tests](https://github.com/webtorrent/node-bencode/actions/workflows/test.yml/badge.svg)](https://github.com/webtorrent/node-bencode/actions/workflows/test.yml)
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fthemasch%2Fnode-bencode.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fthemasch%2Fnode-bencode?ref=badge_shield)
 
 A node library for encoding and decoding bencoded data,