Updated the link to the book: Clean Architectures in Python -A practical approach to better software design by Leonardo Giordani (2nd Edition), to a direct link to the PDF file of the book. (#8570)

* Update free-programming-books-langs.md

Getting Started with Python and Raspberry Pi - Dan Nixon

* Update free-programming-books-langs.md

Clean Architectures in Python - A practical approach to better software design
Depreciated link updated

* Update free-programming-books-langs.md

Clean Architectures in Python - A practical approach to better software design
Direct PDF download link provided

* Update free-programming-books-langs.md

Updated the concerned link

books/free-programming-books-langs.md

@@ -1887,7 +1887,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
     * [Building Skills in Object-Oriented Design, Release 2.2.1](https://web.archive.org/web/20150824204101/http://buildingskills.itmaybeahack.com/book/oodesign-python-2.2/latex/BuildingSkillsinOODesign.pdf) - Steven F. Lott (PDF) (2.2.1)
     * [Building Skills in Object-Oriented Design, Release 3.1](https://web.archive.org/web/20160322093622/http://buildingskills.itmaybeahack.com/book/oodesign-3.1/latex/BuildingSkillsinObject-OrientedDesign.pdf) - Steven F. Lott (PDF) (3.1)
 * [Building Skills in Python](https://web.archive.org/web/20190918094202/http://www.itmaybeahack.com/book/python-2.6/latex/BuildingSkillsinPython.pdf) - Steven F. Lott (PDF) (2.6)
-* [Clean Architectures in Python](https://www.pycabook.com) - Leonardo Giordani (3.x)
+* [Clean Architectures in Python - A practical approach to better software design (2022)](https://www.thedigitalcatbooks.com/pycabook-introduction/) - Leonardo Giordani (3.x) (PDF)
 * [Code Like a Pythonista: Idiomatic Python](https://web.archive.org/web/20180411011411/http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html) - David Goodger
 * [CodeCademy Python](https://www.codecademy.com/learn/python)
 * [Composing Programs](http://composingprograms.com) (3.x)