Keep appVersion in Chart.yaml in sync with minio image release number

Currently, appVersion represents the Minio Operator, which leads to confusing information when using helm list. Use renovate to monitor Chart.yaml's appVersion and keep it in sync with the image version for minio (RELEASE.202x-xx-xxTxx-xx-xxZ). This gives a more accurate picture of which version of Minio is deployed.

Example: https://repo1.dso.mil/platform-one/big-bang/apps/developer-tools/gitlab/-/blob/main/renovate.json#L18-25