Skin providers used by the public instance

List of skin providers used by mchr.cerus.dev:
- NameMC
- Minotar
- Crafatar

If you have any suggestions please write a comment.

Start by checking the repository’s existing documentation for the public-instance skin-provider list. Confirm whether NameMC, Minotar, and Crafatar are recorded accurately; done means the list is documented and suggestions can still be submitted in comments.

Written by the indexing model from the issue text.