Toolbox backup CronJob uses deprecated API version

Summary

As in the version 5.5.1 of the chart toolbox'es backup manifest is defined with

apiVersion: batch/v1beta1
kind: CronJob

In kubernetes v1.21 batch/v1beta1 is now deprecated and is replaced with batch/v1.

Can we please fix it with something like

{{ if $.Capabilities.APIVersions.Has "batch/v1/CronJob" -}}
apiVersion: batch/v1
{{- else -}}
apiVersion: batch/v1beta1
{{- end }}