fix(deps): update dependency @octokit/rest to v21

Author: renovate[bot]

packages/simple-github-release/package.json

@@ -55,7 +55,7 @@
     "test": "run -p lint test:unit test:types"
   },
   "dependencies": {
-    "@octokit/rest": "^20.0.0",
+    "@octokit/rest": "^21.0.0",
     "@types/git-url-parse": "^9.0.1",
     "argue-cli": "^2.1.0",
     "git-url-parse": "^13.0.0",