update backend image to 0.2.1

deployment/helmchart/Chart.yaml

 annotations:
   category: Dashboard
 apiVersion: v2
-appVersion: 0.2.0
+appVersion: 0.2.1
 dependencies:
   - name: common
     # https://artifacthub.io/packages/helm/bitnami/common
@@ -23,4 +23,4 @@ name: stackspin-dashboard
 sources:
   - https://open.greenhost.net/stackspin/dashboard/
   - https://open.greenhost.net/stackspin/dashboard-backend/
-version: 0.2.0
+version: 0.2.1

deployment/helmchart/values.yaml

@@ -235,7 +235,7 @@ backend:
   image:
     registry: open.greenhost.net:4567
     repository: stackspin/dashboard-backend/dashboard-backend
-    tag: 0-2-0
+    tag: 0-2-1
     ## Optionally specify an array of imagePullSecrets.
     ## Secrets must be manually created in the namespace.
     ## ref: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/