Update XscreenSaver lock screen to 21.10.

debian/changelog

@@ -1,3 +1,9 @@
+lubuntu-default-settings (21.10.1) UNRELEASED; urgency=medium
+
+  * Update XscreenSaver lock screen to 21.10.
+
+ -- Dan Simmons <kc2bez@lubuntu.me>  Sun, 15 Aug 2021 20:17:23 -0400
+
 lubuntu-default-settings (21.04.3) hirsute; urgency=medium
 
   * Swap ark for lxqt-archiver.

src/usr/lib/X11/app-defaults/XScreenSaver

@@ -604,4 +604,4 @@ xscreensaver.Dialog.borderWidth:            1
 xscreensaver.Dialog.shadowThickness:        2
 
 ! Some credits to Lubuntu also please. :)
-xscreensaver.passwd.heading.label:		Lubuntu 21.04
+xscreensaver.passwd.heading.label:		Lubuntu 21.10