Support minio zone scale up

[KubrickLiu]

我想把 milvus-helm 中 minio 的 3 个配置暴露在 values.yaml 里，分别是 drivesPerNode,replicas,zones ，目的是达到扩容的效果，请问下使用过程中扩 zone 能达到 milvus 存储扩容的效果吗？

[LoveEachDay]

@KubrickLiu Yes you can increase zones to add a new server pool which will increase the total capacity for your minio cluster. Beware suppose you have drivesPerNode as 1 and replicas as 4, increase zone from 1 to 2, which will add another 4 pods.

[KubrickLiu]

@LoveEachDay I have another question, current minio charts version of milvus helm is too old

Will upgrade to the current version ?