Update copyright notice

Jlqcd.hpp

@@ -1,7 +1,25 @@
 /*
  * Copyright (C) 2026
  *
- * Hadrons presets for the JLQCD scaled-domain-wall ensembles used by iblep.
+ * Author: Antonin Portelli <antonin.portelli@me.com>
+ * Author: Ryan Hill <Ryan.Hill@ed.ac.uk>
+ * Elements based on workflows from Teseo San Jose Perez
+ *
+ * Hadrons 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.
+ *
+ * Hadrons 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 Hadrons.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See the full license in the file "LICENSE" in the top level distribution
+ * directory.
  */
 
 #pragma once