Review `prometheus-k8s` for listing

[tony-meyer]

@adityagoel28

I have listed the charm, but charms will not show up unless they are defaulted to a channel that has a stable release.

I did some investigation and your two options would be to change the default track to 1 (which I can do). Option two would be to release a revision to latest/stable.

@sed-i, @crucible, @lucabello, @jose (and maybe @0x12b) I assume this is related to dropping ‘latest’. I imagine you want 1 to be the default track, but please organise whatever adjustments you prefer.