Fix usage of deprecated functionality in docs

Closes gh-1934

src/docs/asciidoc/web/websocket.adoc

@@ -1769,7 +1769,7 @@ user and associate it with subsequent STOMP messages on the same session:
 
 		@Override
 		public void configureClientInboundChannel(ChannelRegistration registration) {
-			registration.setInterceptors(new ChannelInterceptorAdapter() {
+			registration.interceptors(new ChannelInterceptor() {
 				@Override
 				public Message<?> preSend(Message<?> message, MessageChannel channel) {
 					StompHeaderAccessor accessor =
@@ -1975,7 +1975,7 @@ For example to intercept inbound messages from clients:
 
 		@Override
 		public void configureClientInboundChannel(ChannelRegistration registration) {
-			registration.setInterceptors(new MyChannelInterceptor());
+			registration.interceptors(new MyChannelInterceptor());
 		}
 	}
 ----