feat: upgrade eslint from 8.57.0 to 9.9.0

Snyk has created this PR to upgrade eslint from 8.57.0 to 9.9.0.

See this package in npm:
eslint

See this project in Snyk:
https://app.snyk.io/org/cachiman/project/595d25e7-bbd2-4ab0-a4bb-5f399b1405d1?utm_source=github-cloud-app&utm_medium=referral&page=upgrade-pr

packages/google-cloud-servicedirectory/samples/package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@google-cloud/service-directory": "^5.1.0",
-    "eslint": "^8.0.0",
+    "eslint": "^9.9.0",
     "json-schema": "^0.4.0",
     "uuid": "^9.0.0"
   },