Update redis values to match its chart specification

[tiagoblackcode]

The redis chart in the release 15.4.1 specifies the persistence options under the master key instead of at the top-level.

[tiagoblackcode]

The valid options can be seen here: https://artifacthub.io/packages/helm/bitnami-aks/redis/15.4.1#redis™-master-configuration-parameters

[PatrickHuetter]

Thanks! We will merge your PR after we've tested the redis chart upgrade. We will also upgrade all other dependencies.

[lreneral]

Any update when you will merge it. @PatrickHuetter I had to do the same changes on my deployment.