Add demo for the functionality

Signed-off-by: Danil Grigorev <danil.grigorev@suse.com>

README.md

@@ -11,6 +11,10 @@ It provides the following functionality:
 - The provider will register a newly provisioned CAPI cluster with Fleet so that applications can be automatically deployed to the created cluster using GitOps.
 - The provider will automatically create a [Fleet Cluster Group](https://fleet.rancher.io/cluster-group) for every [CAPI ClusterClass](https://cluster-api.sigs.k8s.io/tasks/experimental-features/cluster-class/). This enables you to deploy the same applications to all clusters created from the same ClusterClass.
 
+## Demo
+
+[![asciicast](https://asciinema.org/a/659626.svg)](https://asciinema.org/a/659626)
+
 ## Getting started
 
 Coming soon!