README.md: add CoreOS to early adopters list
@@ -129,6 +129,7 @@ Please, open a PR if you want to be on the list, or just let us know.
* ABRT
* [standard-test-roles](https://pagure.io/standard-test-roles)
* OSBS (atomic-reactor, osbs-client, koji-containerbuild) (@cverna)
+* CoreOS (starting with rpm-ostree, ignition, and ostree) (@jlebon)
## Resources
