docs(typed-channel): update auto-generated DSL reference

Author: Torkan

documentation/dsls/DSL-AshTypescript.TypedChannel.md

@@ -6,9 +6,14 @@ This file was generated by Spark. Do not edit it by hand.
 Spark DSL extension for defining typed Phoenix channel event subscriptions.
 
 Declares which Ash PubSub publications a channel intercepts. For each declared
-event, AshTypescript reads the publication's `returns` Ash.Type and generates
-a typed TypeScript payload type. An event map and typed subscription helper
-are also generated for the channel.
+event, AshTypescript reads the publication's `returns` type and generates a
+typed TypeScript payload type. An event map and typed subscription helper are
+also generated for the channel.
+
+The recommended way to get typed payloads is to use `transform :some_calc` on
+publications, pointing to a resource calculation with `:auto` typing. Ash
+auto-derives the `returns` type from the calculation expression. You can also
+use explicit `returns:` with an anonymous function transform.
 
 ## Usage
 
@@ -86,8 +91,9 @@ publish event
 Declare a PubSub event to intercept on this channel.
 
 The event name must match the `event` option (or action name fallback) of
-a publication on the resource. The publication must have `returns` set for
-TypeScript type generation.
+a publication on the resource. The publication must have a `returns` type
+for TypeScript type generation — either auto-derived via `transform :calc`
+or explicitly set via `returns:`.