Increment chart version to 0.21.0

Author: armab

Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 # Update StackStorm version here to rely on other Docker images tags
 appVersion: 3.2dev
 name: stackstorm-ha
-version: 0.20.0
+version: 0.21.0
 description: StackStorm K8s Helm Chart, optimized for running StackStorm in HA environment.
 home: https://stackstorm.com/#product
 icon: https://avatars1.githubusercontent.com/u/4969009