Fix sporadic examples failures

Author: ansd

.github/workflows/pr.yml

@@ -38,6 +38,7 @@ jobs:
         # Create CRD PodMonitor without running Prometheus operator
         curl https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/master/bundle.yaml | sed "s/replicas: 1$/replicas: 0/" | kubectl apply -f -
         make install
+        sleep 3 # otherwise we sporadically observe 'no matches for kind "RabbitmqCluster" in version "rabbitmq.com/v1beta1'
         kubectl apply --dry-run=server --recursive -f docs/examples/
 
   system_tests: