Merge pull request openshift#86244 from bscott-rh/OSDOCS-12822

OSDOCS-12822 Added Tag User role to GCP perms

Author: bscott-rh

modules/installation-gcp-permissions.adoc

@@ -34,6 +34,7 @@ When you attach the `Owner` role to the service account that you create, you gra
 
 .Required roles for using the Cloud Credential Operator in passthrough mode
 * Compute Load Balancer Admin
+* Tag User
 
 ifdef::template[]
 .Required roles for user-provisioned GCP infrastructure