chore(deps): bump @octokit/rest from 20.0.2 to 21.0.0

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 20.0.2 to 21.0.0.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v20.0.2...v21.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -38,6 +38,6 @@
     },
     "dependencies": {
         "nodecg-io-core": "^0.3.0",
-        "@octokit/rest": "^20.0.2"
+        "@octokit/rest": "^21.0.0"
     }
 }