Fix the CI badge in the README. (facebook#280)

Summary:
Signed-off-by: Phil Dibowitz <phil@ipom.com>

Pull Request resolved: facebook#280

Differential Revision: D70018347

fbshipit-source-id: 7b77deea2be2b36ad6ee427478dbb1a6aa40c3d5

Author: jaymzh

README.md

@@ -1,6 +1,6 @@
 # Facebook Cookbooks Suite
 
-[![Continuous Integration](https://github.com/facebook/chef-cookbooks/workflows/Continuous%20Integration/badge.svg?event=push)](https://github.com/facebook/chef-cookbooks/actions?query=workflow%3A%22Continuous+Integration%22)
+[![Continuous Integration](https://github.com/facebook/chef-cookbooks/actions/workflows/ci.yml/badge.svg)](https://github.com/facebook/chef-cookbooks/actions/workflows/ci.yml)
 
 This repo contains attribute-driven-API cookbooks maintained by Facebook. It's
 a large chunk of what we refer to as our "core cookbooks."