docs(deployment): Add OpenStack resource controller (#201)

* docs(deployment): Add OpenStack resource controller
* Add hint on ORC being new.
* Add missing empty line.

Signed-off-by: Jan Schoone <jan.schoone@uhurutec.com>
Signed-off-by: Kurt Garloff <kurt@garloff.de>
Co-authored-by: Kurt Garloff <kurt@garloff.de>

Author: jschoone

docs/providers/openstack/quickstart.md

@@ -30,8 +30,11 @@ export CLUSTER_TOPOLOGY=true
 export EXP_CLUSTER_RESOURCE_SET=true
 export EXP_RUNTIME_SDK=true
 clusterctl init --infrastructure openstack
+kubectl apply -f https://github.com/k-orc/openstack-resource-controller/releases/latest/download/install.yaml
 ```
 
+Note that the manual deployment of the openstack resource controller (ORC) is required since capo-0.12. If you use `clusterctl upgrade` to upgrade capo from earlier version, you'll also need to manually add ORC to the management host/cluster.
+
 ### CSO and CSPO variables preparation (CSP)
 
 The CSO and CSPO must be directed to the Cluster Stacks repository housing releases for the OpenStack provider.