update license link

Author: dnth

README.md

@@ -643,9 +643,11 @@ The following are community-contributed blog posts about fastdup -
 ![feedback](./gallery/user_quotes.png)
 
 ## License
-fastdup is licensed under Creative Commons 4.0 license.
+fastdup is licensed under [Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/) Public License. 
+
 See [LICENSE](./LICENSE).
 
+
 For any queries, reach us at [email protected]
 
 ## Disclaimer