Merge pull request #261 from cgwalters/fix-fcos-bootc

docs: Fix FCOS description

Author: cgwalters

docs/index.md

@@ -70,7 +70,7 @@ Many users will be more interested in base (container) images.
 
 For pre-built base images:
 
-* [Fedora CoreOS](https://quay.io/repository/fedora/fedora-coreos) can be used as a base image; you will need to [enable bootc](https://github.com/coreos/rpm-ostree/blob/main/docs/bootc.md) there.
+* [Fedora CoreOS](https://quay.io/repository/fedora/fedora-coreos) can be used as a base image; you will want to also `rpm-ostree install bootc` in your image builds currently.
 * There is also an in-development [centos-boot](https://github.com/centos/centos-boot) project.
 
 However, bootc itself is not tied to Fedora derivatives; [this issue](https://github.com/coreos/bootupd/issues/468) tracks the main blocker for other distributions.