Adjust rabbitmq doc

Author: bcb

docs/rabbitmq.md

@@ -52,36 +52,34 @@ create extension amqp;
 
 ### 🏗 Use pg_amqp
 
-Add to a migration file, e.g. `10-create_api_schema.sql`.
-
-<details>
-<summary>Click to view file</summary>
+Publish messages in a migration script, e.g. `03-create_api_schema.sql`:
 
 ```sql
 -- 10-create_api_schema.sql
 begin;
 
+-- Create task table
 create table api.task (
   id serial primary key,
   name text not null
 );
 
+-- Publish changes to the task table
 create function api.task_updated() returns void
 language plpgsql as $$
 begin
   perform amqp.publish(1, 'amq.topic', 'tasks', json_build_object('event', 'task_updated', 'command', command)::text);
 end;
 $$;
 
+-- Trigger the task_updated function on update
 create trigger task_updated
-before update on api.task
+before insert or update on api.task
 for each row execute procedure api.task_updated();
 
 commit;
 ```
 
-</details>
-
 ## ▶️ 3. Run the Migrations
 
 Once your migrations are ready: