fix(deps): update dependency eslint to v8

Author: renovate-bot

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

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@google-cloud/service-directory": "^4.0.4",
-    "eslint": "^7.0.0",
+    "eslint": "^8.0.0",
     "json-schema": "^0.4.0",
     "uuid": "^9.0.0"
   },