Add Rockstar Developer 2025 Book by Ei Maung (#11186)

* Add Rockstar Developer 2025 Book by Ei Maung

* Update books/free-programming-books-my.md

Change link to single link

Co-authored-by: Eric Hellman <[email protected]>

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Co-authored-by: Eric Hellman <[email protected]>

Author: naylin-dev

books/free-programming-books-my.md

@@ -61,3 +61,4 @@
 * [Professional Web Developer](http://eimaung.com/professional-web-developer) - Ei Maung (PDF)
 * [Professional Web Developer 2023](https://eimaung.com/pwd2023/) - Ei Maung (PDF)
 * [Rockstar Developer](http://eimaung.com/rockstar-developer) - Ei Maung (PDF)
+* [Rockstar Developer 2025](https://github.com/eimg/rsd25) - Ei Maung (PDF, EPUB)