chore(nodejs): update client ref docs link in metadata (#531)

.repo-metadata.json

@@ -2,7 +2,7 @@
   "name": "asset",
   "name_pretty": "Cloud Asset Inventory",
   "product_documentation": "https://cloud.google.com/resource-manager/docs/cloud-asset-inventory/overview",
-  "client_documentation": "https://googleapis.dev/nodejs/asset/latest",
+  "client_documentation": "https://cloud.google.com/nodejs/docs/reference/asset/latest",
   "issue_tracker": "https://issuetracker.google.com/savedsearches/559757",
   "release_level": "ga",
   "language": "nodejs",

README.md

@@ -171,7 +171,7 @@ Apache Version 2.0
 
 See [LICENSE](https://github.com/googleapis/nodejs-asset/blob/master/LICENSE)
 
-[client-docs]: https://googleapis.dev/nodejs/asset/latest
+[client-docs]: https://cloud.google.com/nodejs/docs/reference/asset/latest
 [product-docs]: https://cloud.google.com/resource-manager/docs/cloud-asset-inventory/overview
 [shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
 [projects]: https://console.cloud.google.com/project