add writeup link to day 23 (#804)

docs/2024/puzzles/day23.md

@@ -9,6 +9,7 @@ https://adventofcode.com/2024/day/23
 ## Solutions from the community
 - [Solution](https://github.com/nikiforo/aoc24/blob/main/src/main/scala/io/github/nikiforo/aoc24/D23T2.scala) by [Artem Nikiforov](https://github.com/nikiforo)
 - [Solution](https://github.com/merlinorg/aoc2024/blob/main/src/main/scala/Day23.scala) by [merlinorg](https://github.com/merlinorg)
+- [Writeup](https://thedrawingcoder-gamer.github.io/aoc-writeups/2024/day23.html) by [Bulby](https://github.com/TheDrawingCoder-Gamer)
 
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