Bump @octokit/plugin-paginate-rest and @octokit/rest

Removes [@octokit/plugin-paginate-rest](https://github.com/octokit/plugin-paginate-rest.js). It's no longer used after updating ancestor dependency [@octokit/rest](https://github.com/octokit/rest.js). These dependencies need to be updated together.


Removes `@octokit/plugin-paginate-rest`

Updates `@octokit/rest` from 18.12.0 to 21.1.1
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v18.12.0...v21.1.1)

---
updated-dependencies:
- dependency-name: "@octokit/plugin-paginate-rest"
  dependency-type: indirect
- dependency-name: "@octokit/rest"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]