chore(nodejs): update client ref docs link in metadata (#519)

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

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/master/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
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packages/google-cloud-dataproc/.repo-metadata.json

@@ -1,5 +1,5 @@
 {
-  "client_documentation": "https://googleapis.dev/nodejs/dataproc/latest",
+  "client_documentation": "https://cloud.google.com/nodejs/docs/reference/dataproc/latest",
   "api_id": "dataproc.googleapis.com",
   "distribution_name": "@google-cloud/dataproc",
   "release_level": "ga",

packages/google-cloud-dataproc/README.md

@@ -243,7 +243,7 @@ Apache Version 2.0
 
 See [LICENSE](https://github.com/googleapis/nodejs-dataproc/blob/master/LICENSE)
 
-[client-docs]: https://googleapis.dev/nodejs/dataproc/latest
+[client-docs]: https://cloud.google.com/nodejs/docs/reference/dataproc/latest
 [product-docs]: https://cloud.google.com/dataproc
 [shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
 [projects]: https://console.cloud.google.com/project