Manual Cherry pick to release-1.3 RHDH pull 732 (redhat-developer#751)

* Resolve merge conflict for PR 732

* Minor changes

Author: jmagak

modules/about/ref-supported-platforms.adoc

@@ -12,4 +12,4 @@
 * link:{installing-on-eks-book-url}[{eks-brand-name}]
 * link:{installing-on-aks-book-url}[{aks-brand-name}]
 * link:{installing-on-osd-on-gcp-book-url}[{gcp-brand-name}]
-* link:{installing-on-gke-book-url}[{gke-brand-name}]
+* link:{installing-on-gke-book-url}[{gke-brand-name}]