chore: update helm chart version

Author: ReuDa

charts/steadybit-extension-grafana/Chart.yaml

@@ -1,8 +1,8 @@
 apiVersion: v2
 name: steadybit-extension-grafana
 description: Steadybit grafana extension Helm chart for Kubernetes.
-version: 1.2.7
-appVersion: v1.0.4
+version: 1.2.8
+appVersion: v1.0.5
 home: https://www.steadybit.com/
 icon: https://steadybit-website-assets.s3.amazonaws.com/logo-symbol-transparent.png
 maintainers: