Bump @octokit/rest from 19.0.13 to 20.0.1 (#1003)

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 19.0.13 to 20.0.1.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v19.0.13...v20.0.1)

---
updated-dependencies:
- dependency-name: "@octokit/rest"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>