Update README.md

Author: beacoder

README.md

@@ -1,6 +1,7 @@
 # call-graph - Generate call graph for c/c++ functions
 
 [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](COPYING.md)
+[[https://github.com/beacoder/call-graph/actions][file:https://github.com/beacoder/call-graph/workflows/CI/badge.svg]]
 [![MELPA](https://melpa.org/packages/call-graph-badge.svg)](https://melpa.org/#/call-graph)
 [![MELPA Stable](https://stable.melpa.org/packages/call-graph-badge.svg)](https://stable.melpa.org/#/call-graph)
 [![996.icu](https://img.shields.io/badge/link-996.icu-red.svg)](https://996.icu)