Description of problem:

The tekton trigger and Eventlistener definition does not support the field `taskRunTemplate` as below error is observed:

Error from server (BadRequest): error when creating "trigger.yaml": admission webhook "webhook.triggers.tekton.dev" denied the request: mutation failed: cannot decode incoming new object: json: unknown field "taskRunTemplate"

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The trigger and eventlistener definition in documentation at [1], needs to be updated.

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{}[1]  https://docs.redhat.com/en/documentation/red_hat_openshift_pipelines/1.18/html/creating_cicd_pipelines/creating-applications-with-cicd-pipelines#adding-triggers_creating-applications-with-cicd-pipelines

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