Upgrading a Helm-Based Deployment of VAST CSI Driver

Use the following procedure if both old and new release of VAST CSI Driver are deployed using a Helm chart.

Refresh Helm repository information to see which VAST CSI Driver versions are available for deployment:
```
helm repo update
```
Update the VAST CSI Driver's Helm chart configuration file (values.yaml) to specify the target release of VAST CSI Driver:
```
image:
  csiVastPlugin:
    repository: <repo>
    tag: <new release>
    imagePullPolicy: IfNotPresent
```
Where:
- <repo> is the name of the VAST CSI Driver Helm repository.
- <new release> is the VAST CSI Driver release to be upgraded to.
For example:
```
image:
  csiVastPlugin:
    repository: vastdataorg/csi
    tag: v2.6.2
    imagePullPolicy: IfNotPresent
```
Run Helm upgrade:
```
helm upgrade <old release> <repo>/vastcsi -f <filename>.yaml
```
Where:
- <old release> is the VAST CSI Driver release to be upgraded from.
- <repo> is the name of the VAST CSI Driver Helm repository.
- vastcsi is the name of the VAST CSI Driver Helm chart.
- <filename>.yaml is the Helm chart configuration file.
For example:
```
helm upgrade csi-driver vastcsi/vastcsi -f values.yaml
```
Verify the status of the new VAST CSI Driver chart release:
```
helm ls
```