README.md: update leaderboard

commit generated automatically from
https://github.com/fxnn/adventofcode2024/actions/runs/12224583458

Author: fxnn

README.md

@@ -5,7 +5,7 @@ See https://adventofcode.com/2024
 
 [//]: # (LEADERBOARD_BEGIN)
 
-> user **fxnn** (10 stars, last one at 2024-12-08T12:24:26Z)
+> user **fxnn** (12 stars, last one at 2024-12-08T19:15:56Z)
 
 [//]: # (LEADERBOARD_END)