Beginner: how do I send an update back to a publisher

Hi – just run through the tutorial – so that’s the extent of my knowledge right now.

Goal of running through this was to understand how I could contribute an updated snap for something I use that is currently old (skaffold) – I think at this point, I can’t but I can namespace to aliwatters-skaffold and alias locally. Is that correct?

If not how can I contribute back an updated snap to a publisher?