README.md in avromatic-0.15.0 vs README.md in avromatic-0.15.1

@@ -56,9 +56,16 @@
 * **schema_registry**: An `AvroTurf::SchemaRegistry` object used to store Avro schemas 
   so that they can be referenced by id. Either `schema_registry` or 
   `registry_url` must be configured.
 * **registry_url**: URL for the schema registry. Either `schema_registry` or 
   `registry_url` must be configured.
+* **use_cacheable_schema_registration**: Avromatic supports a Schema Registry
+  [extension](https://github.com/salsify/avro-schema-registry#extensions) that
+  provides an endpoint to lookup existing schema ids by fingerprint.
+  A successful response from this GET request can be cached indefinitely.
+  The use of this additional endpoint can be disabled by setting this option to
+  `false` and this is recommended if using a Schema Registry that does not support
+  the endpoint.
 * **messaging**: An `AvroTurf::Messaging` object to be shared by all generated models.
   The `build_messaging!` method may be used to create a `Avromatic::Messaging`
   instance based on the other configuration values.
 * **logger**: The logger to use for the schema registry client.
 * [Custom Types](#custom-types)