fix article volunteering link (#856)

Author: SethTisue

.github/workflows/scripts/addDay.scala

@@ -20,7 +20,7 @@ def template(title: String, day: Int, year: Int) =
     |## Solutions from the community
     |
     |Share your solution to the Scala community by editing this page.
-    |You can even write the whole article! [See here for the expected format](https://github.com/scalacenter/scala-advent-of-code/discussions/424)
+    |You can even write the whole article! [Go here to volunteer](https://github.com/scalacenter/scala-advent-of-code/discussions/842)
     |""".stripMargin
 
 def scrapeTitle(day: Int, year: Int) =

docs/2025/puzzles/day01.md

@@ -300,4 +300,4 @@ def part2(input: String) =
 - [Solution](https://github.com/aamiguet/advent-2025/blob/main/src/main/scala/ch/aamiguet/advent2025/Day01.scala) by [Antoine Amiguet](https://github.com/aamiguet)
 
 Share your solution to the Scala community by editing this page.
-You can even write the whole article! [See here for the expected format](https://github.com/scalacenter/scala-advent-of-code/discussions/424)
+You can even write the whole article! [Go here to volunteer](https://github.com/scalacenter/scala-advent-of-code/discussions/842)