Commented out imagePullPolicy in config-demo-deployment.yaml

## Description

The `imagePullPolicy` is commented out, same issue as hello-world.

## Location

https://github.com/validatedpatterns/multicloud-gitops/blob/main/charts/all/config-demo/templates/config-demo-deployment.yaml#L27

```yaml
#imagePullPolicy: Always
```