chore(nodejs): update client ref docs link in metadata (#33)

Author: fhinkel

packages/google-cloud-clouddms/.repo-metadata.json

@@ -2,7 +2,7 @@
   "name": "dms",
   "name_pretty": "Cloud Database Migration Service",
   "product_documentation": "https://cloud.google.com/database-migration/",
-  "client_documentation": "https://googleapis.dev/nodejs/dms/latest",
+  "client_documentation": "https://cloud.google.com/nodejs/docs/reference/dms/latest",
   "issue_tracker": "https://github.com/googleapis/nodejs-dms/issues",
   "release_level": "ga",
   "language": "nodejs",

packages/google-cloud-clouddms/README.md

@@ -147,7 +147,7 @@ Apache Version 2.0
 
 See [LICENSE](https://github.com/googleapis/nodejs-dms/blob/master/LICENSE)
 
-[client-docs]: https://googleapis.dev/nodejs/dms/latest
+[client-docs]: https://cloud.google.com/nodejs/docs/reference/dms/latest
 [product-docs]: https://cloud.google.com/database-migration/
 [shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
 [projects]: https://console.cloud.google.com/project