triggers.eventing.knative.dev CRD, wrong subscriberUri jsonpath in additionalPrinterColumns

**Describe the bug**

`k get triggers <name>` does not show `SUBSCRIBER_URI`:

```
k get triggers
NAME                 READY   REASON   BROKER    SUBSCRIBER_URI   AGE
testevents-trigger   True             default                    2m
```


 **Expected behavior**

It's shown



 **Knative release version**
* HEAD
* 0.14

