docs: declare Event Replay feature as stable (angular#57895)

This commit drops the `@developerPreview` annotation from the `withEventReplay()` function, which effectively makes the Event Replay feature stable. PR Close angular#57895

Author: AndrewKushnir

adev/src/content/guide/hydration.md

@@ -75,7 +75,6 @@ bootstrapApplication(App, {
 });
 ```
 
-IMPORTANT: the Event Replay feature is currently in [Developer Preview](/reference/releases#developer-preview).
 
 ## Constraints
 

packages/platform-browser/src/hydration.ts

@@ -111,7 +111,6 @@ export function withI18nSupport(): HydrationFeature<HydrationFeatureKind.I18nSup
  * providers: [provideClientHydration(withEventReplay())]
  * });
  * ```
- * @developerPreview
  * @publicApi
  * @see {@link provideClientHydration}
  */