Bump octokit from 4.11.0 to 4.12.0
Bump octokit from 4.11.0 to 4.12.0

Bumps [octokit](https://github.com/octokit/octokit.rb) from 4.11.0 to 4.12.0.
- [Release notes](https://github.com/octokit/octokit.rb/releases)
- [Changelog](https://github.com/octokit/octokit.rb/blob/master/RELEASE.md)
- [Commits](https://github.com/octokit/octokit.rb/compare/v4.11.0...v4.12.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
andrew/contribulator,wadtech/contribulator,24pullrequests/contribulator,24pullrequests/contribulator,wadtech/contribulator,jasnow/contribulator,wadtech/contribulator,andrew/contribulator,jasnow/contribulator,andrew/contribulator,jasnow/contribulator,24pullrequests/contribulator