If you would like to override the image of the queue-proxy, please use the configuration spec.deployment.queue-sidecar-image, because the image is configured with a configmap in knative serving named config-deployment.
Configure it like this in operator CR:
```
spec:
config:
deployment:
queue-sidecar-image: <the link to your image>
```
It is the standard way to override keys in configMaps. Do not use the one `spec.registry.override.queue-proxy`.
The spec.registry.override... only works for images that are available in deployments, DaemonSet, StatefulSet and job, on their `image` fields.