tf docs

Author: alexnuttall

infrastructure/terraform/modules/backend-api/README.md

@@ -66,6 +66,7 @@ No requirements.
 |------|-------------|
 | <a name="output_api_base_url"></a> [api\_base\_url](#output\_api\_base\_url) | n/a |
 | <a name="output_download_bucket_name"></a> [download\_bucket\_name](#output\_download\_bucket\_name) | n/a |
+| <a name="output_download_bucket_regional_domain_name"></a> [download\_bucket\_regional\_domain\_name](#output\_download\_bucket\_regional\_domain\_name) | n/a |
 | <a name="output_internal_bucket_name"></a> [internal\_bucket\_name](#output\_internal\_bucket\_name) | n/a |
 | <a name="output_quarantine_bucket_name"></a> [quarantine\_bucket\_name](#output\_quarantine\_bucket\_name) | n/a |
 | <a name="output_send_proof_queue_url"></a> [send\_proof\_queue\_url](#output\_send\_proof\_queue\_url) | n/a |