Update dependency @actions/github to v9

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
   },
   "dependencies": {
     "@actions/core": "1.2.7",
-    "@actions/github": "3.0.0"
+    "@actions/github": "9.0.0"
   },
   "devDependencies": {
     "eslint": "7.9.0",