Day13: Add another solution (#836)

Author: rolandtritsch

docs/2024/puzzles/day13.md

@@ -228,6 +228,7 @@ def part2(input: String): Long =
 - [Solution](https://github.com/TheDrawingCoder-Gamer/adventofcode2024/blob/e163baeaedcd90732b5e19f578a2faadeb1ef872/src/main/scala/Day13.scala) by [Bulby](https://github.com/TheDrawingCoder-Gamer)
 - [Solution](https://github.com/jportway/advent2024/blob/master/src/main/scala/Day13.scala) by [Joshua Portway](https://github.com/jportway)
 - [Solution](https://github.com/AvaPL/Advent-of-Code-2024/tree/main/src/main/scala/day13) by [Paweł Cembaluk](https://github.com/AvaPL)
+- [Solution](https://github.com/rolandtritsch/scala3-aoc-2024/blob/trunk/main/src/aoc2024/Day13.scala) by [Roland Tritsch](https://github.com/rolandtritsch)
 
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