chore: Update copyrights

Version.hpp

@@ -1,21 +1,5 @@
-/*
- * Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
- *
- * This file is part of QodeAssist.
- *
- * QodeAssist 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.
- *
- * QodeAssist 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 QodeAssist. If not, see <https://www.gnu.org/licenses/>.
- */
+// Copyright (C) 2025 Povilas Kanapickas <povilas@radix.lt>
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 #pragma once