Fixing mispelling of Libvirt in root README

Author: Jim Crowley

README.md

@@ -170,7 +170,7 @@ Be aware that this variables may be subject to change again in future versions.
     *   [kubic-terraform-kvm](https://github.com/kubic-project/kubic-terraform-kvm) Kubic Terraform script using KVM/libvirt
 
 * [Community Driven Docker Examples](contrib/)
-   Docker examples showing how to use the Libirt Provider
+   Docker examples showing how to use the Libvirt Provider
 
 ## Authors