* Update 1 book URL in free-programming-books-id.md

Update URL for Pemrograman Kompetitif Dasar

* Add new MongoDB book at free-programming-books-langs.md

Added MongoDB Notes for Professionals

* Added Git for Professionals Tutorial at free-courses-en.md

Git for Professionals Tutorial - Tools & Concepts for Mastering Version Control with Git

* Added Git & GitHub tutorial playlist at free-courses-en.md

* Adding credit to the instructor