Update readme

README.md

@@ -155,8 +155,9 @@ polymorphic_embeds_many :contexts,
     age: MyApp.Context.Age,
     device: MyApp.Context.Device
   ],
+  on_replace: :delete,
   on_type_not_found: :raise,
-  on_replace: :delete
+  nilify_unlisted_types_on_load: [:deprecated_type]
 ```
 
 #### Options
@@ -173,7 +174,7 @@ polymorphic_embeds_many :contexts,
   By default, a changeset error "is invalid" is added.
 * `:on_replace` – mandatory option that can only be set to `:update` for a single embed and `:delete` for a list of
   embeds (we force a value as the default value of this option for `embeds_one` and `embeds_many` is `:raise`).
-* `:retain_unlisted_types_on_load`: allow the following unconfigured types to be loaded without raising an error. Useful for handling deprecated structs still present in the database.
+* `:retain_unlisted_types_on_load`: allow unconfigured types to be loaded without raising an error. Useful for handling deprecated structs still present in the database.
 * `:nilify_unlisted_types_on_load`: same as `:retain_unlisted_types_on_load`, but nilify the struct on load.
 
 ### Displaying form inputs and errors in Phoenix templates