List Repositories fails with per_pages=100 #1037

curl -vH "Accept: application/vnd.github.scarlet-witch-preview+json, application/vnd.github.mercy-preview+json" \
    https://api.github.com/users/kubernetes/repos\?page\=1\&per_page\=100

request takes 10 seconds and fails with HTTP 502 Bad Gateway and body:

{
  "message": "Server Error"
}

I know this is really a GitHub API issue (I just reported to GitHub) but it seems like it's reproducibly happening with these Accept header values injected by go-github by default:

• application/vnd.github.scarlet-witch-preview+json
• application/vnd.github.mercy-preview+json

removing the Accept makes the request succeed just fine. So maybe go-github shouldn't use these headers by default, yet?