argoworkflow templateref using variable

argo-workflow-template-ref.yaml

apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: hello-world-at-v0.1.0
spec:
  templates:
    - name: hello-world
      inputs:
        parameters:
          - name: msg
            value: "hello world"
      container:
        image: docker/whalesay
        command: [cowsay]
        args: ["{{inputs.parameters.msg}}"]
---
apiVersion: argoproj.io/v1alpha1
kind: WorkflowTemplate
metadata:
  name: hello-world-at-master
spec:
  templates:
    - name: hello-world
      inputs:
        parameters:
          - name: msg
            value: "hello world"
      container:
        image: docker/whalesay
        command: [cowsay]
        args: ["{{inputs.parameters.msg}}"]
---
apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: hello-world-local-arg-
spec:
  entrypoint: whalesay
  arguments:
    parameters:
      - name: wftversion
        value: master
  templates:
    - name: whalesay
      steps:
        - - name: hello-world
            templateRef:
              name: hello-world-at-${wftverion}
              template: hello-world