Update TDM

Author: squillero

README.md

@@ -5,5 +5,7 @@ This repo contains notes and code fragments for my lectures of *Computational In
 
 Students are encouraged to join the Telegram group [polito_01urrov](https://t.me/polito_01urrov).
 
-**Copyright © [Giovanni Squillero](https://squillero.github.io/)** (unless otherwise noted in individual files)  
-Copying and distributing these files are permitted under certain conditions, see file [`LICENSE.md`](./LICENSE.md) for details.
+**Copyright © [Giovanni Squillero](https://squillero.github.io/)**, unless otherwise specified in individual files.  
+Copying and distribution of these files are permitted under certain conditions. Please refer to [`LICENSE.md`](./LICENSE.md) for full details.
+
+:biohazard: The author reserves all rights under Article 4(3) of Directive (EU) 2019/790. Text and Data Mining (TDM), whether for commercial or non-commercial purposes, is prohibited without the author's prior express consent.