spot-termination-exporter: Add appVersion field

Add appVersion field to Helm can display the version of the app that's
deployed when using 'helm list' and similar commands.

Author: hwoarang

spot-termination-exporter/Chart.yaml

@@ -3,7 +3,8 @@ name: spot-termination-exporter
 home: https://banzaicloud.com
 sources:
   - https://github.com/banzaicloud/banzai-charts
-version: 0.0.8
+appVersion: 0.0.1
+version: 0.0.9
 description: Spot Termination exporter Helm chart for Kubernetes
 keywords:
 - spot