make octokit instance available as octokit on top of github, to make it easier to seamless to copy examples from GitHub api or octokit documentation

[iamstarkov]

examples on GitHub api documentation use octokit as an octokit instance, so does the octokit documentation itself. its kinda a bummer to always rename when you copy from documentation or from another files.

I understand that octokit was made available over the github keyword, and I dont want to break that, but it won't hurt nobody to expose octokit instance over the octokit keyword as well and it will help people who use documentation a lot

// api docs
await octokit.request('GET /repos/{owner}/{repo}/commits/{commit_sha}/pulls', {
  owner: 'OWNER',
  repo: 'REPO',
  commit_sha: 'COMMIT_SHA',
})

// octokit documentation
octokit.rest.repos.listPullRequestsAssociatedWithCommit({
  owner,
  repo,
  commit_sha,
});

what do you think? if this is something you are up for adding, let me know and I adjust documentation accordingly

[joshmgross]

Thanks for the suggestion @iamstarkov - my one concern with this change is that users may assume octokit is Octokit and that could create additional confusion if something does not work as expected.