[Camel-Knative-example] unknown command 'broker'

I am not able to install knative broker using `kn` cli tool downloaded from my OCP 4.5.

What I did:

• install serverless-operator from OperatorHub

  ➜  camel-k-example-knative git:(master) oc get csv
  NAME                         DISPLAY                         VERSION   REPLACES   PHASE
  serverless-operator.v1.7.2   OpenShift Serverless Operator   1.7.2                Succeeded
  

• Use `command-line-tools` link to download `kn` cli

• ➜  camel-k-example-knative git:(master) kn broker create default 
  Error: unknown command 'broker' 
  Run 'kn --help' for usage.
  

  ➜  camel-k-example-knative git:(master) kn help   
  Manage your Knative building blocks:
  
  * Serving: Manage your services and release new software to them.
  * Eventing: Manage event subscriptions and channels. Connect up event sources.
  
  Usage:
    kn [command]
  
  Available Commands:
    completion  Output shell completion code
    help        Help about any command
    plugin      Plugin command group
    revision    Revision command group
    route       Route command group
    service     Service command group
    source      Event source command group
    trigger     Trigger command group
    version     Prints the client version
  
  Flags:
        --config string        kn config file (default is ~/.config/kn/config.yaml)
    -h, --help                 help for kn
        --kubeconfig string    kubectl config file (default is ~/.kube/config)
        --log-http             log http traffic
        --lookup-plugins       look for kn plugins in $PATH
        --plugins-dir string   kn plugins directory (default "~/.config/kn/plugins")
  
  Use "kn [command] --help" for more information about a command.
  

  ➜  camel-k-example-knative git:(master) kn version               
  Version:      v0.13.2
  Build Date:   2020-04-17 06:24:25
  Git Revision: cdafb7f
  Supported APIs:
  * Serving
    - serving.knative.dev/v1 (knative-serving v0.13.2)
  * Eventing
    - sources.eventing.knative.dev/v1alpha1 (knative-eventing v0.13.6)
    - sources.eventing.knative.dev/v1alpha2 (knative-eventing v0.13.6)
    - eventing.knative.dev/v1alpha1 (knative-eventing v0.13.6)