8262883: doccheck: Broken links in java.base

Reviewed-by: lancea

src/java.base/share/classes/java/nio/channels/DatagramChannel.java

@@ -172,7 +172,7 @@ public abstract class DatagramChannel
      * java.nio.channels.spi.SelectorProvider} object.  The channel will not be
      * connected.
      *
-     * @apiNote <a href="package-summary.html#unixdomain">Unix domain</a> sockets
+     * @apiNote {@linkplain java.net.UnixDomainSocketAddress Unix domain} sockets
      * are not supported by DatagramChannel.
      *
      * @param   family

src/java.base/share/classes/java/nio/channels/SocketChannel.java

@@ -332,7 +332,7 @@ public abstract class SocketChannel
      * another socket can bind to the same name. If a socket channel to a Unix
      * Domain socket is <i>implicitly</i> bound by connecting it without calling
      * bind first, then its socket is
-     * <a href="../../java/net/UnixDomainSocketAddress.html#unnamed">unnamed</a>
+     * <a href="../../../java/net/UnixDomainSocketAddress.html#unnamed">unnamed</a>
      * with no corresponding socket file in the file-system. If a socket channel
      * to a Unix Domain socket is <i>automatically</i> bound by calling {@code
      * bind(null)} this results in an unnamed socket also.