Bump @octokit/rest from 18.0.0 to 18.0.12

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.0.0 to 18.0.12.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v18.0.0...v18.0.12)

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Author: dependabot[bot]