Add ArtifactHub badge

https://artifacthub.io/packages/helm/stackstorm/stackstorm-ha

Author: arm4b

Chart.yaml

@@ -44,4 +44,3 @@ dependencies:
     version: 12.3.2
     repository: https://charts.bitnami.com/bitnami
     condition: redis.enabled
-

README.md

@@ -1,5 +1,6 @@
 # `stackstorm-ha` Helm Chart
 [![Build Status](https://circleci.com/gh/StackStorm/stackstorm-ha/tree/master.svg?style=shield)](https://circleci.com/gh/StackStorm/stackstorm-ha)
+[![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/stackstorm-ha)](https://artifacthub.io/packages/helm/stackstorm/stackstorm-ha)
 
 K8s Helm Chart for running StackStorm cluster in HA mode.