Update README.md (#173)

Summary:
Update CI badge. Created from web UI. Seems to be more up-to-date than the previous one.

Pull Request resolved: #173

Reviewed By: brianc118

Differential Revision: D53140421

Pulled By: lnyng

fbshipit-source-id: 8ef3c7d3c2f034abd9604af1e101916104e50c79

README.md

@@ -1,6 +1,6 @@
 # oomd
 
-[![Support Ukraine](https://img.shields.io/badge/Support-Ukraine-FFD500?style=flat&labelColor=005BBB)](https://opensource.fb.com/support-ukraine) [![Build Status](https://github.com/facebookincubator/oomd/workflows/CI/badge.svg?branch=main)](https://github.com/facebookincubator/oomd/actions?query=workflow%3ACI+branch%3Amain)
+[![Support Ukraine](https://img.shields.io/badge/Support-Ukraine-FFD500?style=flat&labelColor=005BBB)](https://opensource.fb.com/support-ukraine) [![CI](https://github.com/facebookincubator/oomd/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/facebookincubator/oomd/actions/workflows/ci.yml)
 
 oomd is *userspace* Out-Of-Memory (OOM) killer for linux systems.