at: Update Copyright for 2024

Signed-off-by: Mark Grant <m.grant.prg@gmail.com>

configure.ac

@@ -1,6 +1,6 @@
 #########################################################################
 #									#
-# Author: Copyright (C) 2018-2023  Mark Grant				#
+# Author: Copyright (C) 2018-2024  Mark Grant				#
 #									#
 # Released under the GPLv3 only.					#
 # SPDX-License-Identifier: GPL-3.0-only					#
@@ -43,11 +43,11 @@
 #					#
 #########################################
 
-AC_COPYRIGHT([Copyright (C) 2018-2023  Mark Grant
+AC_COPYRIGHT([Copyright (C) 2018-2024  Mark Grant
 	      This script is free to copy or distribute under the terms set out
 	      in the package license. See COPYING for details.])
 
-AC_REVISION([$Revision: 1.3.0 $])
+AC_REVISION([$Revision: 1.3.1 $])
 
 AC_PREREQ([2.69])