Event listener with triggerRef crashes the console

Description of problem :   

Event listeners has an optional `triggerRef` field which is not compatible in UI code causes the UI to crash

Prerequisites (if any, like setup, operators/versions):     

Openshift Pipelines operator 1.2.2 (ocp-4.6)

Steps to Reproduce

1. Create an eventlistener with this yaml:

   apiVersion: triggers.tekton.dev/v1alpha1
   kind: EventListener
   metadata:
     name: vote-app
   spec:
     serviceAccountName: pipeline
     triggers:
       - triggerRef: vote-app
   

   Source: https://github.com/mancubus77/tekton-maybeuibug/tree/main/tekton

Actual results: 

UI crashes with a `name of undefined` error in the browser console

Expected results: 

UI should handle the new types and should not break 

Reproducibility (Always/Intermittent/Only Once): 

Always

Additional info: 

Update the eventListener types based on the triggers doc