doc: ссылка на Git Notes for Professionals

README.md

@@ -47,6 +47,7 @@
 * [Pro Git](http://git-scm.com/book/ru)
 * [Тренажёр-самоучитель](https://learngitbranching.js.org/?locale=ru_RU)
 * [Шпаргалка](https://github.com/ValeryLVS/Git)
+* [Git® Notes for Professionals](https://goalkicker.com/GitBook/)
 
 ## Преподаватели