docs: crds are installed by the operator (#749)

Author: sweb

docs/modules/superset/pages/getting_started/installation.adoc

@@ -45,7 +45,8 @@ Install the Stackable Operators:
 include::example$getting_started/getting_started.sh[tag=helm-install-operators]
 ----
 
-Helm will deploy the operators in a Kubernetes Deployment and apply the CRDs for the Superset service (as well as the CRDs for the required operators).
+Helm will deploy the operators in a Kubernetes Deployment.
+Each operator installs and maintains its own CRDs at startup (see xref:concepts:maintenance/crds.adoc[]).
 You are now ready to deploy Superset in Kubernetes.
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