invoke.mdx: snapshot.children.<actorId>

Author: audionerd

docs/invoke.mdx

@@ -698,7 +698,7 @@ _Coming soon_
 
 ## Referencing Invoked Actors
 
-Actors can be read on `snapshot.children.<actorId>[index]`. The returned value is an `ActorRef` object, with properties like:
+Actors can be read on `snapshot.children.<actorId>`. The returned value is an `ActorRef` object, with properties like:
 
 - `id` - the ID of the actor
 - `send()`
@@ -712,6 +712,8 @@ actor.subscribe({
 });
 ```
 
+`snapshot.children` is a key-value object where the keys are the actor ID and the value is the `ActorRef`.
+
 ## TypeScript
 
 _Coming soon_