flake.lock: Update (#488)

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/250481a' (2026-01-05)
  → 'github:hercules-ci/flake-parts/80daad0' (2026-01-11)
• Updated input 'homebrew-cask':
    'github:homebrew/homebrew-cask/b95b431' (2026-01-11)
  → 'github:homebrew/homebrew-cask/ae04004' (2026-01-12)
• Updated input 'homebrew-core':
    'github:homebrew/homebrew-core/961e723' (2026-01-11)
  → 'github:homebrew/homebrew-core/b7c7ac1' (2026-01-12)
• Updated input 'nix-packages':
    'github:devusb/nix-packages/a9ded82' (2026-01-10)
  → 'github:devusb/nix-packages/ce40e3c' (2026-01-12)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/716ce36' (2026-01-10)
  → 'github:nixos/nixpkgs/b4262d9' (2026-01-11)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/0c445aa' (2026-01-10)
  → 'github:numtide/treefmt-nix/e96d59d' (2026-01-11)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: devusb