Review `route53-lego-k8s` charm for listing

[mcjaeger (Michael Jaeger)]

@gruyaume if Shu-Do approved the PR I think it should be fine.

@shu-du in order to have a clear outcome of the review we would like to use a form where you confirm all the points for review.

Please see this post from Ghislain as an example:

Review `superset-k8s` charm for listing

Here is the checklist: Checked Review item Objective Review criteria ✓ Intended functionality Despite all the items for publication readiness, the charm must work. Charm does what it is meant to do - ideally done in a demo. ✓ Charmhub.io charm detail page A complete and consistent appearance of the charm is required for a quality impression of the charm collection. The overall appearance looks good, which means: * The name complies with the naming guidelines. * The publisher is iden…