Update day17.md (#748)

Add Day17 solution by Alex Mc'key

docs/2024/puzzles/day17.md

@@ -10,6 +10,7 @@ https://adventofcode.com/2024/day/17
 
 - [Solution](https://github.com/Philippus/adventofcode/blob/main/src/main/scala/adventofcode2024/Day17.scala) by [Philippus Baalman](https://github.com/philippus)
 - [Solution](https://github.com/merlinorg/aoc2024/blob/main/src/main/scala/Day17.scala) by [merlinorg](https://github.com/merlinorg)
+- [Solution](https://github.com/AlexMckey/AoC2024_Scala/blob/master/src/year2024/day17.scala) by [Alex Mc'key](https://github.com/AlexMckey)
 
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