License file updated

LICENSE

 _____________________________________________________________________________
 
                                 OATS - INAF
- Osservatorio Astronomico di Tireste - Istituto Nazionale di Astrofisica
+ Osservatorio Astronomico di Trieste - Istituto Nazionale di Astrofisica
  Astronomical Observatory of Trieste - National Institute for Astrophysics
 ____________________________________________________________________________
 
     Copyright (C) 2020-2021  Istituto Nazionale di Astrofisica
 
-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 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
@@ -18,6 +18,6 @@ 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, write to the Free Software Foundation, Inc., 
-51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 _____________________________________________________________________________