Added default compute network tier to project module

Author: apichick

modules/project/README.md

@@ -28,6 +28,7 @@ This module implements the creation and management of one GCP project including
 - [Quotas](#quotas)
 - [Quotas factory](#quotas-factory)
 - [VPC Service Controls](#vpc-service-controls)
+- [Default compute network tier](#default-compute-network-tier)
 - [Project Related Outputs](#project-related-outputs)
 - [Managing project related configuration without creating it](#managing-project-related-configuration-without-creating-it)
 - [Observability](#observability)