Adding a book on cellular automata (#11509)

* Update free-programming-books-langs.md

A book on C++ standard coding practices has also been added to the 'By Programming Language' section.

* Update free-programming-books-subjects.md

Author: margaret-hu

books/free-programming-books-subjects.md

@@ -172,6 +172,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 
 * [A New Kind of Science](https://www.wolframscience.com/nksonline/toc.html) - Stephen Wolfram
 * [An Introduction to Cellular Automata](https://ia801004.us.archive.org/26/items/viviencellularautomata/vivien%20cellular%20automata.pdf) - Hélène Vivien (PDF)
+* [Introduction to the Modeling and Analysis of Complex Systems](https://milneopentextbooks.org/introduction-to-the-modeling-and-analysis-of-complex-systems/) - Hiroki Sayama
 
 
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