scripts: Update header in generated files

scripts/generate-license-data

@@ -17,21 +17,7 @@ import subprocess
 HEADER = '''#
 # Copyright © Michal Čihař <michal@weblate.org>
 #
-# This file is part of Weblate <https://weblate.org/>
-#
-# 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
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-#
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 """License data definitions.