Update description string based on feedback from Benni

Author: meeech

src/@orb.yml

@@ -1,7 +1,8 @@
 version: 2.1
 
 description: >
-  Orb for deploying models to AWS sagemaker and tracking releases in CircleCI
+  Orb for deploying models to AWS sagemaker and tracking releases in CircleCI.
+  (OPEN PREVIEW - send us your feedback at [email protected])
 
 display:
   home_url: "https://github.com/CircleCI-Public/aws-sagemaker-orb/wiki"