chore(readme): updated readme

Author: foxhound87

README.md

@@ -7,7 +7,7 @@
 
 [![NPM](https://nodei.co/npm/mobx-react-form.png?downloads=true&downloadRank=true&stars=true)](https://nodei.co/npm/mobx-react-form/)
 
-![GitHub Workflow Status (with branch)](https://img.shields.io/github/actions/workflow/status/foxhound87/mobx-react-form/ci.yml?branch=next)
+![GitHub Workflow Status (with branch)](https://img.shields.io/github/actions/workflow/status/foxhound87/mobx-react-form/ci.yml?branch=master)
 ![GitHub release (latest by date)](https://img.shields.io/github/v/release/foxhound87/mobx-react-form)
 ![npm bundle size](https://img.shields.io/bundlephobia/min/mobx-react-form)
 [![Codecov Coverage](https://img.shields.io/codecov/c/github/foxhound87/mobx-react-form/master.svg)](https://codecov.io/gh/foxhound87/mobx-react-form)