build(deps): Bump @octokit/rest from 20.1.0 to 21.0.0

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 20.1.0 to 21.0.0.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v20.1.0...v21.0.0)

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

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

package.json

@@ -17,7 +17,7 @@
   "dependencies": {
     "@actions/core": "^1.10.1",
     "@actions/github": "^6.0.0",
-    "@octokit/rest": "^20.1.0",
+    "@octokit/rest": "^21.0.0",
     "actions-util": "^1.1.4"
   },
   "devDependencies": {