Upgrade VAST COSI Driver

Steps to Upgrade VAST COSI Driver

Complete these steps to upgrade VAST COSI Driver:

Refresh Helm repository information to see which VAST COSI Driver versions are available for deployment:
```
helm repo update
```
Update the VAST COSI Driver's Helm chart configuration file (values.yaml) to specify the target release of VAST COSI Driver:
```
image:
  csiVastPlugin:
    repository: <repo>
    tag: <new release>
    imagePullPolicy: IfNotPresent
```
- <repo> is the name of the VAST COSI Driver Helm repository.
- <new release> is the VAST COSI Driver release to be upgraded to.
For example:
```
image:
  csiVastPlugin:
    repository: vastdataorg/csi
    tag: v2.6.0
    imagePullPolicy: IfNotPresent
```
Run Helm upgrade:
```
helm upgrade <old release> <repo>/vastcosi -f <filename>.yaml
```
Where:
- <old release> is the VAST COSI Driver release to be upgraded from.
- <repo> is the name of the VAST COSI Driver Helm repository.
- vastcosi is the name of the VAST COSI Driver Helm chart.
- <filename>.yaml is the Helm chart configuration file.
Verify the status of the new VAST COSI Driver chart release:
```
helm ls
```