fix(k8s): upgrade cronjob API

Author: themightychris

helm-chart/templates/cronjob.backups.yaml

@@ -1,6 +1,6 @@
 {{- if .Values.backups.enabled -}}
 
-apiVersion: batch/v1beta1
+apiVersion: batch/v1
 kind: CronJob
 metadata:
   name: {{ .Release.Name }}-backups
@@ -92,4 +92,4 @@ spec:
                     --keep-weekly {{ .Values.backups.prune.keepWeekly }}
                 "
 
-{{- end }}
+{{- end }}