Port from CE: Edits for GKE whitepaper note

doc/install/google_cloud_platform/index.md

@@ -8,12 +8,11 @@ description: 'Learn how to install a GitLab instance on Google Cloud Platform.'
 
 Getting started with GitLab on a [Google Cloud Platform (GCP)][gcp] instance is quick and easy.
 
-NOTE: **Note:** Google provides a whitepaper for [deploying production-ready GitLab on
-Google Kubernetes Engine][whitepaper], including all steps and external
-resource configuration. These are alternative to using a GCP VM, and use
-the [Cloud native GitLab Helm chart](https://docs.gitlab.com/charts)
-
-[whitepaper]: https://cloud.google.com/solutions/deploying-production-ready-gitlab-on-gke
+NOTE: **Note:**
+Google provides a whitepaper for [deploying production-ready GitLab on
+Google Kubernetes Engine](https://cloud.google.com/solutions/deploying-production-ready-gitlab-on-gke),
+including all steps and external resource configuration. These are an alternative to using a GCP VM, and use
+the [Cloud native GitLab Helm chart](https://docs.gitlab.com/charts).
 
 ## Prerequisites