fix: disable Pod Security Standards for Calico to work

Disabling it until an updated template is released with support for setting exemptions namespaces

Author: dkoshkin

README.md

@@ -17,9 +17,12 @@ eval $(make kind.kubeconfig)
 ```
 
 To create a cluster with [clusterctl](https://cluster-api.sigs.k8s.io/user/quick-start.html), run:
+(Set `POD_SECURITY_STANDARD_ENABLED=false` to disable
+[Pod Security Standards](https://kubernetes.io/docs/concepts/security/pod-security-standards/),
+until exemptions namespaces are configurable)
 
 ```shell
-clusterctl generate cluster capi-quickstart \
+POD_SECURITY_STANDARD_ENABLED=false clusterctl generate cluster capi-quickstart \
   --flavor development \
   --kubernetes-version v1.26.0 \
   --control-plane-machine-count=1 \