Adding remark for deploy-openstack-compute

The patch adds notice regarding the pipeline is not
production ready yet and cannot be used for it.

Change-Id: I6ec1a386a66b16682cd81f830989832bbd1cd30d
Related-PROD: PROD-25551 (PROD:25551)
(cherry picked from commit c917945f76980a6a32909035c11fab58782070ee)
diff --git a/jenkins/client/job/deploy/openstack.yml b/jenkins/client/job/deploy/openstack.yml
index d5ed556..d18ccae 100644
--- a/jenkins/client/job/deploy/openstack.yml
+++ b/jenkins/client/job/deploy/openstack.yml
@@ -44,6 +44,7 @@
         deploy-openstack-compute:
           type: workflow-scm
           concurrent: true
+          description: "\n    This pipeline is provided as technical preview. Do not use the pipeline in production environments as the result of the pipeline is unpredictable."
           discard:
             build:
               keep_num: 50