Ability to retrieve pending image name for notifications

[danielnovello-pf]

Right now, I can get the current image for the deployment with the following that can be sent to Slack for notifications.

{
  "title": "Current Image",
  "value": "{{ (index .app.status.summary.images 0 | split `:`)._1 }}", 
  "short": true
}

It would be really helpful to be able to retrieve the pending image changed name from either .diff or the live helm
The updates for the image name are created the Argocd-Image-Updater and stored in Git. So maybe a way to gather it from there?

Unless there is a way, and I'm missing it in the documentation somewhere?