Fix typo in documentation

See gh-22394

src/docs/asciidoc/web/websocket.adoc

@@ -695,8 +695,8 @@ The following example shows how to do so in Java configuration:
 [subs="verbatim,quotes"]
 ----
 	@Configuration
-	@EnableWebSocket
-	public class WebSocketConfig implements WebSocketConfigurer {
+	@EnableWebSocketMessageBroker
+	public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
 
 		@Override
 		public void registerStompEndpoints(StompEndpointRegistry registry) {