!53 Modify the license to SPDX format

From: @Linux_zhang2024 
Reviewed-by: @gaoruoshu 
Signed-off-by: @gaoruoshu

at.spec

@@ -1,8 +1,8 @@
 Name:             at
 Version:          3.1.23
-Release:          6
+Release:          7
 Summary:          A job manager
-License:          GPLv3+, GPLv2+, ISC, MIT, Public Domain
+License:          GPL-3.0-or-later AND GPL-2.0-or-later AND ISC
 URL:              http://ftp.debian.org/debian/pool/main/a/at
 Source0:          http://ftp.debian.org/debian/pool/main/a/at/at_%{version}.orig.tar.gz
 Source1:          pam_atd
@@ -125,6 +125,13 @@ chown root:root %{_localstatedir}/spool/at/.SEQ
 %{_mandir}/man*/*
 
 %changelog
+* Mon Sep 02 2024 Linux_zhang <zhangruifang@h-partners.com> - 3.1.23-7
+- Type：update
+- ID：NA
+- SUG:NA
+- DESC: Modify the license to SPDX format
+        Delete MIT and Public Domain license because it no longer appears in the upstream source
+
 * Tue Aug 18 2020 chenyaqiang <chenyaqiang@huawei.com> - 3.1.23-6
 - rebuild for package build