Document the required permissions for private and restricted OCP cluster

Author: xenolinux

installing/installing_gcp/installing-restricted-networks-gcp-installer-provisioned.adoc

@@ -18,6 +18,7 @@ You can install an {product-title} cluster by using mirrored installation releas
 
 * You reviewed details about the xref:../../architecture/architecture-installation.adoc#architecture-installation[{product-title} installation and update] processes.
 * You read the documentation on xref:../../installing/installing-preparing.adoc#installing-preparing[selecting a cluster installation method and preparing it for users].
+* You xref:../../installing/installing_gcp/installing-gcp-account.adoc#installing-gcp-account[configured a GCP project] to host the cluster.
 * You xref:../../installing/disconnected_install/installing-mirroring-installation-images.adoc#installation-about-mirror-registry_installing-mirroring-installation-images[mirrored the images for a disconnected installation] to your registry and obtained the `imageContentSources` data for your version of {product-title}.
 +
 [IMPORTANT]