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

Author: renovate[bot]

package-lock.json

@@ -29,7 +29,7 @@
   "license": "MIT",
   "dependencies": {
     "@actions/core": "1.10.1",
-    "@octokit/rest": "20.1.1",
+    "@octokit/rest": "21.0.0",
     "markdown-table": "3.0.3",
     "tunnel": "0.0.6"
   },