The global leaderboard is no more! So we should change our global leaderboard command.

The change should cover the following things:

• Command itself should not be removed
• Embed should state that global leaderboard is no longer, link to reddit announcement from Wastl
  • Option 1 link: https://www.reddit.com/r/adventofcode/comments/1ocwh04/changes_to_advent_of_code_starting_this_december/
  • Option 2 link: https://adventofcode.com/2025/about
• Link or provide instructions for how to view it for past years (optional, depends how it fits/looks/etc)