Update README.md

Author: ws-garcia

README.md

@@ -397,7 +397,7 @@ Visit [this site](https://ws-garcia.github.io/VBA-CSV-interface/limitations/csv_
 
 ## Licence
 
-Copyright (C) 2022  [W. García](https://github.com/ws-garcia/).
+Copyright (C) 2020-2022  [W. García](https://github.com/ws-garcia/).
 
 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.