switch to graphql for nixpkgs-update-fetch-github

[zowoq]

Current rest api takes a couple of hours to complete a run, even with a token to increase the rate limits.

There is some graphql discussion and examples in the upstream repo: nix-community/nixpkgs-update-github-releases#5.

infra/hosts/build02/nixpkgs-update.nix

Line 173 in 5f13323

systemd.services.nixpkgs-update-fetch-github = mkFetcher "github" "${inputs.nixpkgs-update-github-releases}/main.py";

[zowoq]

nix-community/nixpkgs-update-github-releases@6cefc97

The github update data is basically redundant for python3 packages as they use their own updateScript, not fetching that data is roughly a 1/3 improvement.