Missing GCP end attribute

Author: codyhoag

modules/ssh-agent-using.adoc

@@ -269,6 +269,9 @@ endif::[]
 ifeval::["{context}" == "installing-gcp-vpc"]
 :!gcp:
 endif::[]
+ifeval::["{context}" == "installing-restricted-networks-gcp-installer-provisioned"]
+:!gcp:
+endif::[]
 ifeval::["{context}" == "installing-bare-metal"]
 :!user-infra:
 endif::[]