update: add Advent of Code '24 playlist (#4630)

* Add Advent of Code '24 playlist

* chore: update advent-of-code.md

---------

Co-authored-by: Andrey Polyakov <[email protected]>

Author: nikpachoo

docs/topics/advent-of-code.md

@@ -4,6 +4,7 @@
 every day from December 1 to December 25. With the permission of [Eric Wastl](http://was.tl/), creator of Advent of Code,
 we'll show how to solve these puzzles using the idiomatic Kotlin style:
 
+* [Advent of Code 2024](https://www.youtube.com/playlist?list=PLlFc5cFwUnmwHaD3-qeoLHnho_PY2g9JX)
 * [Advent of Code 2023](https://www.youtube.com/playlist?list=PLlFc5cFwUnmzk0wvYW4aTl57F2VNkFisU)
 * [](#advent-of-code-2022)
 * [](#advent-of-code-2021)