grafana persistence enabled

argocd/apps/grafana/grafana.yaml

@@ -32,6 +32,8 @@ spec:
           value: 'grafana.innovation-hub-niedersachsen.de-tls'
         - name: ingress.annotations.traefik\.ingress\.kubernetes\.io\/router\.entrypoints
           value: websecure
+        - name: persistence.enabled
+          value: 'true'  
         - name: admin.userKey
           value: 'admin'
         - name: admin.passwordKey