fix source and version of gcs_bucket module

Author: mariammartins

4-projects/modules/base_env/example_storage_cmek.tf

@@ -43,8 +43,9 @@ resource "random_string" "bucket_name" {
 }
 
 module "gcs_buckets" {
-  source  = "terraform-google-modules/cloud-storage/google//modules/simple_bucket"
-  version = "~> 6.0"
+  source = "terraform-google-modules/cloud-storage/google//modules/simple_bucket"
+  # Open Issue on version 6.1.0: https://github.com/terraform-google-modules/terraform-google-cloud-storage/issues/339
+  version = "~> 6.0.0"
 
   project_id              = module.base_shared_vpc_project.project_id
   location                = var.location_gcs