Update copyright years and license information

Updated the copyright years to 2024 and revised the license information for consistency and accuracy. This ensures the codebase reflects the correct legal information and adheres to the project's licensing guidelines.

MekHQ/src/mekhq/campaign/stratcon/StratconTrackState.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022 - The MegaMek Team. All Rights Reserved.
+ * Copyright (c) 2020-2024 - The MegaMek Team. All Rights Reserved.
  *
  * This file is part of MekHQ.
  *

MekHQ/src/mekhq/gui/stratcon/CampaignManagementDialog.java

@@ -1,16 +1,21 @@
 /*
-* MegaMek - Copyright (C) 2021 - The MegaMek Team
-*
-* 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 2 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.
-*/
+ * Copyright (c) 2021-2024 - The MegaMek Team. All Rights Reserved.
+ *
+ * This file is part of MekHQ.
+ *
+ * MekHQ 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.
+ *
+ * MekHQ 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 MekHQ. If not, see <http://www.gnu.org/licenses/>.
+ */
 
 package mekhq.gui.stratcon;