chore(deps): update dependency @octokit/rest to v21 (googleapis#3704)

Author: renovate-bot

.github/scripts/package.json

@@ -14,7 +14,7 @@
         "js-yaml": "^4.1.0"
     },
     "devDependencies": {
-        "@octokit/rest": "^19.0.0",
+        "@octokit/rest": "^21.0.0",
         "mocha": "^10.0.0",
         "sinon": "^21.0.0"
     }