graphql seems to require _api.github.com/graphql_ in authinfo

[andrelkin]

It all looks ea2f1b4 Use GraphQL API broke authentication for my environment (emacs 28 + ubuntu 18.04).
that was content with documented

machine api.github.com ...

I did not bisect it but supposedly after the commit I saw an error

Error talking to GitHub: ((error http 401 ((message . Bad credentials) (documentation_url . https://docs.github.com/rest)))

which is worked around with appending the path.