Using webhook driver scaling,

[ns-kbhat]

We are trying to deploy the following spec to use github webhook driver scaling on our runners using workflowjob events. I'm using the example from the official docs for workflowjob, translated to terraform spec.

spec = {
      # Runners in the targeted RunnerDeployment won't be scaled down
      # for 5 minutes instead of the default 10 minutes now
      scaleDownDelaySecondsAfterScaleOut = 300
      scaleTargetRef = {
        name = each.value.manifest.metadata.name
      }

      minReplicas = 0
      maxReplicas = 25

      scaleUpTriggers = [
        {
          githubEvent = {
            workflowJob = {}
          }
          duration = "1m"
        }
      ]
    }
}

This is not passing the validation and throwing the below error:

│ AttributeName("spec"): [AttributeName("spec")] failed to morph object element into object element: AttributeName("spec").AttributeName("scaleUpTriggers"): [AttributeName("spec").AttributeName("scaleUpTriggers")] failed to morph object element into object element:
│ AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0): [AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0)] failed to morph tuple element into tuple element: AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0).AttributeName("githubEvent"):
│ [AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0).AttributeName("githubEvent")] failed to morph object element into object element: AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0).AttributeName("githubEvent").AttributeName("workflowJob"):
│ [AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0).AttributeName("githubEvent").AttributeName("workflowJob")] failed to morph object element into object element:
│ AttributeName("spec").AttributeName("scaleUpTriggers").ElementKeyInt(0).AttributeName("githubEvent").AttributeName("workflowJob"): type is nil

Any suggestion on what could be wrong here?