add book to Python section: Scientific Visualization: Python + Matplotlib (#8454)

* add Scientific Visualization: Python + Matplotlib check_urls=free-programming-books-langs.md

* change url to the repo

Co-authored-by: Roanna Victorio <roannav@users.noreply.github.com>

books/free-programming-books-langs.md

@@ -1968,6 +1968,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 * [Python Programming](https://upload.wikimedia.org/wikipedia/commons/9/91/Python_Programming.pdf) - Wikibooks (PDF) (2.6)
 * [Python Programming And Numerical Methods: A Guide For Engineers And Scientists](https://pythonnumericalmethods.berkeley.edu/notebooks/Index.html) - Qingkai Kong, Timmy Siauw, Alexandre Bayen (3.7)
 * [Python Tutorial](https://www.tutorialspoint.com/python/) - Tutorials Point (HTML, PDF)
+* [Scientific Visualization: Python + Matplotlib](https://github.com/rougier/scientific-visualization-book) - Nicolas P. Rougier (PDF)
 * [Scipy Lecture Notes](http://scipy-lectures.github.io)
 * [SICP in Python](http://www-inst.eecs.berkeley.edu/~cs61a/sp12/book/) (3.2)
 * [Slither into Python: An introduction to Python for beginners](https://web.archive.org/web/20210411065902/https://www.slitherintopython.com/) (3.7) *(:card_file_box: archived)*