flake.lock: Update

Flake lock file updates:

• Updated input 'nix-darwin':
    'github:LnL7/nix-darwin/71a3a075e3229a7518d76636bb762aef2bcb73ac?narHash=sha256-Ys9pSP9ch0SthhpbjnkCSJ9ZLfaNKnt/dcy7swjmS1A%3D' (2024-12-29)
  → 'github:LnL7/nix-darwin/6a1fdb2a1204c0de038847b601cff5012e162b5e?narHash=sha256-62xAPSs5VRZoPH7eRanUn5S5vZEd%2B8vM4bD5I%2Bzxokc%3D' (2024-12-31)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/9f94733f93e4fe6e82f516efae007096e4ab5a21?narHash=sha256-Qoz0ow6jDGUIBHxduc7Y1cjYFS71tvEGJV5Src/mj98%3D' (2024-12-28)
  → 'github:NixOS/nixpkgs/edf04b75c13c2ac0e54df5ec5c543e300f76f1c9?narHash=sha256-tfYRbFhMOnYaM4ippqqid3BaLOXoFNdImrfBfCp4zn0%3D' (2024-12-31)
• Updated input 'nixpkgs-darwin':
    'github:NixOS/nixpkgs/3ffbbdbac0566a0977da3d2657b89cbcfe9a173b?narHash=sha256-As8I%2BebItDKtboWgDXYZSIjGlKeqiLBvjxsQHUmAf1Q%3D' (2024-12-30)
  → 'github:NixOS/nixpkgs/464fe85c27bd5761781a2773526ef9c1b0184dda?narHash=sha256-6jNmY7BaooArDpOhT8QbGxR0x8as43AJUoHfm1rJY1M%3D' (2024-12-30)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/6d97d419e5a9b36e6293887a89a078cf85f5a61b?narHash=sha256-opBsbR/nrGxiiF6XzlVluiHYb6yN/hEwv%2BlBWTy9xoM%3D' (2024-12-30)
  → 'github:NixOS/nixpkgs/69b9a8c860bdbb977adfa9c5e817ccb717884182?narHash=sha256-5zJyv66q68QZJZsXtmjDBazGnF0id593VSy%2B8eSckoo%3D' (2024-12-31)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/9e09d30a644c57257715902efbb3adc56c79cf28?narHash=sha256-8T3K5amndEavxnludPyfj3Z1IkcFdRpR23q%2BT0BVeZE%3D' (2024-12-25)
  → 'github:numtide/treefmt-nix/56c0ecd79f7ba01a0ec027da015df751d6ca3ae7?narHash=sha256-Q6xAmciTXDtZfUxf6c15QqtRR8BvX4edYPstF/uoqMk%3D' (2024-12-31)