chore: update CODEOWNERS

Author: cloud-foundation-bot

CODEOWNERS

@@ -1,5 +1,5 @@
 # NOTE: This file is automatically generated from values at:
-# https://github.com/GoogleCloudPlatform/cloud-foundation-toolkit/blob/master/infra/terraform/test-org/org/locals.tf
+# https://github.com/GoogleCloudPlatform/cloud-foundation-toolkit/blob/main/infra/terraform/test-org/org/locals.tf
 
 * @terraform-google-modules/cft-admins @apeabody @ericyz