add workflow status badge

Author: chatch

README.md

@@ -1,6 +1,7 @@
 # Forge FSQL CLI
 
 [![NPM Package](https://img.shields.io/npm/v/forge-fsql.svg?style=flat-square)](https://www.npmjs.org/package/forge-fsql)
+[![CI](https://github.com/chatch/forge-fsql/actions/workflows/ci.yml/badge.svg)](https://github.com/chatch/forge-fsql/actions/workflows/ci.yml)
 
 Interactive CLI for querying Atlassian Forge SQL databases via web triggers.