Update README.md (eugenp#4155)

pivovarit · web-flow · commit fdd80a278fad · 2018-05-02T09:20:30.000+02:00
diff --git a/core-java-io/README.md b/core-java-io/README.md
@@ -26,3 +26,4 @@
 - [Java NIO2 Path API](http://www.baeldung.com/java-nio-2-path)
 - [A Guide to WatchService in Java NIO2](http://www.baeldung.com/java-nio2-watchservice)
 - [Guide to Java NIO2 Asynchronous Channel APIs](http://www.baeldung.com/java-nio-2-async-channels)
+- [A Guide to NIO2 Asynchronous Socket Channel](http://www.baeldung.com/java-nio2-async-socket-channel)
