nfs-utils: update homepage link

The linux-nfs project switched to a new homepage. Update the help text
link.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/nfs-utils/Config.in

@@ -11,7 +11,7 @@ config BR2_PACKAGE_NFS_UTILS
 	help
 	  The NFS Linux kernel server.
 
-	  http://sourceforge.net/projects/nfs
+	  http://linux-nfs.org/
 
 if BR2_PACKAGE_NFS_UTILS