chore: point towards the master branch for the CI badge

Author: darrachequesne

README.md

@@ -1,7 +1,7 @@
 
 # socket.io-client
 
-[![Build Status](https://github.com/socketio/socket.io-client/workflows/CI/badge.svg)](https://github.com/socketio/socket.io-client/actions)
+[![Build Status](https://github.com/socketio/socket.io-client/workflows/CI/badge.svg?branch=master)](https://github.com/socketio/socket.io-client/actions)
 [![Dependency Status](https://david-dm.org/socketio/socket.io-client.svg)](https://david-dm.org/socketio/socket.io-client)
 [![devDependency Status](https://david-dm.org/socketio/socket.io-client/dev-status.svg)](https://david-dm.org/socketio/socket.io-client#info=devDependencies)
 [![NPM version](https://badge.fury.io/js/socket.io-client.svg)](https://www.npmjs.com/package/socket.io-client)