KameletBinding to broker fails

[nicolaferraro]

E.g.

apiVersion: camel.apache.org/v1alpha1
kind: KameletBinding
metadata:
  name: telegram-binding
spec:
  sink:
    ref:
      apiVersion: eventing.knative.dev/v1
      kind: Broker
      name: default
  source:
    properties:
      authorizationToken: 'xxx'
    ref:
      apiVersion: camel.apache.org/v1alpha1
      kind: Kamelet
      name: telegram-source

Results in impossibility to create Knative SinkBinding.