chore: add github action badge (#13)

* chore: add github action badge

* chore: fix markdown syntax

closes #12

Author: jmosawy

README.md

@@ -5,3 +5,4 @@ An opinionated and re-usable Prettier config file created by Jeff Mosawy
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![version](https://img.shields.io/github/package-json/v/jmosawy/prettier-config)](https://github.com/jmosawy/prettier-config/)
 [![outdated](https://img.shields.io/librariesio/release/npm/@jmosawy/prettier-config)](https://github.com/jmosawy/prettier-config/)
+[![publish](https://github.com/jmosawy/prettier-config/actions/workflows/publish.yml/badge.svg)](https://github.com/jmosawy/)