update link for: The Art of Prolog, Second Edition (EbookFoundation#7077)

Co-authored-by: austin <[email protected]>

Author: coder054

Diff for: books/free-programming-books-langs.md

@@ -1790,7 +1790,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Prolog Problems](https://sites.google.com/site/prologsite/prolog-problems) - Werner Hett
 * [Prolog Tutorial](https://www.cpp.edu/~jrfisher/www/prolog_tutorial/contents.html) - J. R. Fisher
 * [Simply Logical: Intelligent Reasoning by Example](https://book.simply-logical.space) - Peter Flach
-* [The Art of Prolog, Second Edition](https://mitpress.mit.edu/books/art-prolog-second-edition) - Leon S. Sterling, Ehud Y. Shapiro (Open Access)
+* [The Art of Prolog, Second Edition](https://mitpress.mit.edu/9780262691635/the-art-of-prolog/) - Leon S. Sterling, Ehud Y. Shapiro (Open Access)
 * [The First 10 Prolog Programming Contests](https://dtai.cs.kuleuven.be/ppcbook) - Bart Demoen, Phuong-Lan Nguyen, Tom Schrijvers, Remko Tronçon
 * [The Power of Prolog](https://www.metalevel.at/prolog) - Markus Triska
 * [Warren's Abstract Machine: A Tutorial Reconstruction](http://wambook.sourceforge.net) - Hassan A¨it-Kaci