Add nichobi's solution for day 9 (#920)

* Add nichobi's solution for day 9
* Fix nichobi's solution link for day 08

Author: nichobi

docs/2025/puzzles/day08.md

@@ -13,7 +13,7 @@ https://adventofcode.com/2025/day/8
 - [Solution](https://github.com/henryk-cesnolovic/advent-of-code-2025/blob/main/d8/solution.scala) by [Henryk Česnolovič](https://github.com/henryk-cesnolovic)
 - [Solution](https://github.com/Philippus/adventofcode/blob/main/src/main/scala/adventofcode2025/Day08.scala) by [Philippus Baalman](https://github.com/philippus)
 - [Solution](https://github.com/aamiguet/advent-2025/blob/main/src/main/scala/ch/aamiguet/advent2025/Day08.scala) by [Antoine Amiguet](https://github.com/aamiguet)
-- [Solution](https://codeberg.org/nichobi/adventofcode/src/branch/main/2025/07/solution.scala) by [nichobi](https://nichobi.com)
+- [Solution](https://codeberg.org/nichobi/adventofcode/src/branch/main/2025/08/solution.scala) by [nichobi](https://nichobi.com)
 
 Share your solution to the Scala community by editing this page.
 You can even write the whole article! [Go here to volunteer](https://github.com/scalacenter/scala-advent-of-code/discussions/842)

docs/2025/puzzles/day09.md

@@ -7,6 +7,7 @@ import Solver from "../../../../../website/src/components/Solver.js"
 https://adventofcode.com/2025/day/9
 
 ## Solutions from the community
+- [Solution](https://codeberg.org/nichobi/adventofcode/src/branch/main/2025/09/solution.scala) by [nichobi](https://nichobi.com)
 
 Share your solution to the Scala community by editing this page.
 You can even write the whole article! [Go here to volunteer](https://github.com/scalacenter/scala-advent-of-code/discussions/842)