CODCHECK vs. NISO badges recommendations

[Just noting this here if there is a revision made.]

https://doi.org/10.3789/niso-rp-31-2021

It's a pity that they have `ROR-R` (reproduced) only as an extension of `ROR` (reviewed), whereas CODECHECK does reproduction without too much code review. _Could go into future work?_

Also, the idea to add a crpytographic hash in the image header for authentication of the badge source is interesting, but would require an own badge server.