chore(nodejs): update client ref docs link in metadata (#284)

Author: fhinkel

packages/grafeas/.repo-metadata.json

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

packages/grafeas/README.md

@@ -153,7 +153,7 @@ Apache Version 2.0
 
 See [LICENSE](https://github.com/googleapis/nodejs-grafeas/blob/master/LICENSE)
 
-[client-docs]: https://googleapis.dev/nodejs/grafeas/latest
+[client-docs]: https://cloud.google.com/nodejs/docs/reference/grafeas/latest
 [product-docs]: https://cloud.google.com/container-registry/docs/container-analysis
 [shell_img]: https://gstatic.com/cloudssh/images/open-btn.png
 [projects]: https://console.cloud.google.com/project