Updated README.

README.md

@@ -3,6 +3,7 @@ bimg
 
 Image library.
 
+[![GitHub Actions](https://github.com/bkaradzic/bimg/actions/workflows/main.yml/badge.svg)](https://github.com/bkaradzic/bimg/actions)
 [![License](https://img.shields.io/badge/license-BSD--2%20clause-blue.svg)](https://bkaradzic.github.io/bgfx/license.html)
 [![Join the chat at https://discord.gg/9eMbv7J](https://img.shields.io/discord/712512073522872352?color=%237289DA&label=bimg&logo=discord&logoColor=white)](https://discord.gg/9eMbv7J)