Add git pro book in other languages (#12767)

* add Pro Git book and Git section in Azerbaijani and Bulgarian languages

* add Pro Git book and Git section for Greek and Dutch/Netherlands languages

* add Slovenian language for books; add Pro Git book and Git section to Slovenian language books

* add authors for Pro Git book for Azerbaijani and Bulgarian languages

* fix md formatting errors for books languages az and sl

* fix new line in the end of file for books languages az and sl

* fix md lint formatting error - not enough empty lines after section for books languages az and sl

* fix md linter error in books az file

---------

Co-authored-by: Roman Lazunin <roman.lazunin@xylem.com>

README.md

@@ -113,6 +113,7 @@ This project lists books and other resources grouped by genres:
 + [Russian / Русский язык](books/free-programming-books-ru.md)
 + [Serbian / српски језик / srpski jezik](books/free-programming-books-sr.md)
 + [Slovak / slovenčina](books/free-programming-books-sk.md)
++ [Slovenian / Slovenščina](books/free-programming-books-sl.md)
 + [Spanish / español / castellano](books/free-programming-books-es.md)
 + [Swedish / Svenska](books/free-programming-books-sv.md)
 + [Tamil / தமிழ்](books/free-programming-books-ta.md)

books/free-programming-books-az.md

@@ -1,9 +1,9 @@
 ### Index
 
 * [C](#c)
+* [Git](#git)
 * [HTML](#html)
 * [Linux](#linux)
-  
 
 
 ### C
@@ -11,6 +11,11 @@
 * [C Proqramlaşdırma Dili](https://web.archive.org/web/20241214000729/https://ilkaddimlar.com/ders/c-proqramlasdirma-dili) ( :card_file_box: archived)
 
 
+### Git
+
+* [Pro Git](https://git-scm.com/book/az/v2) - Scott Chacon, Ben Straub (HTML, PDF, EPUB)
+
+
 ### HTML
 
 * [HTML](https://web.archive.org/web/20241214005042/https://ilkaddimlar.com/ders/html) ( :card_file_box: archived)
@@ -20,5 +25,3 @@
 
 * [Linux](https://web.archive.org/web/20241214095624/https://ilkaddimlar.com/ders/linux) ( :card_file_box: archived)
 
-
-

books/free-programming-books-bg.md

@@ -3,6 +3,7 @@
 * [C](#c)
 * [C#](#csharp)
 * [C++](#cpp)
+* [Git](#git)
 * [Java](#java)
 * [JavaScript](#javascript)
 * [LaTeX](#latex)
@@ -28,6 +29,11 @@
 * [Основи на програмирането със C++](https://cpp-book.softuni.bg) - Светлин Наков и колектив
 
 
+### Git
+
+* [Pro Git](https://git-scm.com/book/bg/v2) - Scott Chacon, Ben Straub (HTML, PDF, EPUB)
+
+
 ### Java
 
 * [Въведение в програмирането с Java](https://introprogramming.info/intro-java-book) - Светлин Наков и колектив

books/free-programming-books-el.md

@@ -3,6 +3,7 @@
 * [C](#c)
 * [C#](#csharp)
 * [C++](#cpp)
+* [Git](#git)
 * [Java](#java)
 * [JavaScript](#javascript)
 * [Matlab](#matlab)
@@ -30,6 +31,11 @@
 * [Προγραμματισμός με τη γλώσσα C++](https://repository.kallipos.gr/bitstream/11419/6443/3/00_master_document-KOY.pdf) - Θεόδωρος Αλεβίζος (PDF) (CC BY-NC-SA)
 
 
+### Git
+
+* [Pro Git](https://git-scm.com/book/gr/v2) - Scott Chacon, Ben Straub (HTML, PDF, EPUB, MOBI)
+
+
 ### Java
 
 * [Δομές δεδομένων](https://repository.kallipos.gr/bitstream/11419/6217/3/DataStructures-%CE%9A%CE%9F%CE%A5.pdf) - Γεωργιάδης Λουκάς, Νικολόπουλος Σταύρος, Παληός Λεωνίδας (PDF)

books/free-programming-books-nl.md

@@ -3,6 +3,7 @@
 * [C](#c)
 * [C#](#csharp)
 * [COBOL](#cobol)
+* [Git](#git)
 * [Java](#java)
 * [PHP](#php)
     * [Symfony](#symfony)
@@ -25,6 +26,11 @@
 * [Programmeren in COBOL](https://nl.wikibooks.org/wiki/Programmeren_in_COBOL) - Wikibooks
 
 
+### Git
+
+* [Pro Git](https://git-scm.com/book/nl/v2) - Scott Chacon, Ben Straub (HTML, PDF, EPUB)
+
+
 ### Java
 
 * [Programmeren in Java](https://nl.wikibooks.org/wiki/Programmeren_in_Java) - Wikibooks

books/free-programming-books-sl.md

@@ -0,0 +1,7 @@
+* [Git](#git)
+
+
+### Git
+
+* [Pro Git](https://git-scm.com/book/sl/v2) - Scott Chacon, Ben Straub (HTML, PDF, EPUB)
+