update the operator output note

Signed-off-by: ericsyh <[email protected]>

charts/pulsar-operator/templates/NOTES.txt

@@ -1,4 +1,12 @@
                                               StreamNative Operators for Apache Pulsar
 
-The StreamNative Pulsar Operators bring the specific controllers for Kubernetes by providing specific Custom Resource Definition (CRD) which is developed and maintained by StreamNative Inc.
-Installing the StreamNative Pulsar Operators means you agreed to and are in compliance with https://streamnative.io/community-licence.
+StreamNative now offers a unified approach to managing Pulsar clusters on Kubernetes systems, transitioning from two distinct versions of operators—Pulsar Operators (Basic Version) and StreamNative Operator (Advanced Version)—to a single, consolidated operator, StreamNative Operator, effective from the start of 2024. As part of this change, we will cease the release of new versions of Pulsar Operators, with future updates and enhancements being exclusively available through the StreamNative Operator, accessible only via StreamNative's paid services.
+
+Apply for trial:
+Before installing StreamNative Private Cloud, you need to import a valid license. You can contact StreamNative to apply for a free trial https://streamnative.io/deployment/start-free-trial. 
+
+Quick Start:
+Follow our Quick Start guide https://docs.streamnative.io/private/private-cloud-quickstart to quickly provision and manage Pulsar clusters with the StreamNative Private Cloud.
+
+Upgrade to StreamNative Operator:
+Follow the Upgrade guide https://docs.streamnative.io/private/Upgrade-from-pulsar-operators to easily upgraded to to the StreamNative Operator.