Just in case anyone is paranoid that this comment has the right key, you can generate a fingerprint with

    $ ssh-keygen -lf github.old.pub
    2048 SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8 no comment (RSA)

and you'll notice that fingerprint is on this archived page

https://web.archive.org/web/20230320230907/https://docs.gith...

(please check my work on your own machines and don't take my attestation on faith!)