6987154: HTML link to serialization guide is broken

Reviewed-by: skannan

src/share/classes/java/io/package.html

@@ -44,7 +44,7 @@ or method in any class or interface in this package will cause a
 For overviews, tutorials, examples, guides, and tool documentation,
 please see:
 <ul>
-  <li><a href="../../../guide/serialization">Serialization Enhancements</a>
+  <li><a href="../../../technotes/guides/serialization">Serialization Enhancements</a>
 </ul>
 
 @since JDK1.0