docs: correct description of output decorator and add links to guide (#31780)

PR Close #31780

aio/content/guide/observables-in-angular.md

@@ -2,17 +2,17 @@
 
 Angular makes use of observables as an interface to handle a variety of common asynchronous operations. For example:
 
-* The `EventEmitter` class lets you use observables with the Angular `@Output` decorator.
+* You can define [custom events](guide/template-syntax#custom-events-with-eventemitter) that send observable output data from a child to a parent component.
 * The HTTP module uses observables to handle AJAX requests and responses.
 * The Router and Forms modules use observables to listen for and respond to user-input events.
 
-## Event emitter
+## Transmitting data between components
 
-Angular provides an `EventEmitter` class that is used when publishing values from a component through the `@Output()` decorator.
+Angular provides an `EventEmitter` class that is used when publishing values from a component through the [`@Output()` decorator](guide/template-syntax#how-to-use-output).
 `EventEmitter` extends [RxJS `Subject`](https://rxjs.dev/api/index/class/Subject), adding an `emit()` method so it can send arbitrary values.
 When you call `emit()`, it passes the emitted value to the `next()` method of any subscribed observer.
 
-A good example of usage can be found on the [EventEmitter](https://angular.io/api/core/EventEmitter) documentation. Here is the example component that listens for open and close events:
+A good example of usage can be found in the [EventEmitter](https://angular.io/api/core/EventEmitter) documentation. Here is the example component that listens for open and close events:
 
 `<zippy (open)="onOpen($event)" (close)="onClose($event)"></zippy>`