Update apiVersion on cronjob

[AlexandreAllemand]

The batch/v1beta1 API version of CronJob will no longer be served in v1.25 on kubernetes. Migrate manifests and API clients to use the batch/v1 API version, available since v1.21.

Signed-off-by: AlexandreAllemand [email protected]

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Which issue this PR fixes

(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged)

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Checklist

• [x] DCO signed
• [ ] Chart Version bumped
• [ ] CHANGELOG.md was updated