localechooser: update localechooser to new compatible d-i version

helpers/make-localechooser

 #!/bin/sh
 #
-#    Copyright (C) 2008-2011  Rubén Rodríguez <ruben@trisquel.info>
+#    Copyright (C) 2008-2022  Rubén Rodríguez <ruben@trisquel.info>
 #
 #    This program is free software; you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -17,7 +17,9 @@
 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 #
 
-VERSION=1
+VERSION=2
+EXTERNAL='deb-src http://ftp.debian.org/debian stable main'
+REPOKEY=648ACFD622F3D138
 NETINST=true
 
 . ./config