Map s3-directory-bucket -> s3 for Go API ref.

Author: Laren-AWS

aws_doc_sdk_examples_tools/config/sdks.yaml

@@ -122,6 +122,7 @@ Go:
           route-53-domains: route53domains
           route53-recovery-cluster: route53recoverycluster
           s3-control: s3control
+          s3-directory-buckets: s3
           secrets-manager: secretsmanager
           service-catalog: servicecatalog
           service-catalog-appregistry: servicecatalogappregistry