flake.lock: Update (#498)

Flake lock file updates:

• Updated input 'home-manager':
    'github:nix-community/home-manager/d6e3935' (2026-01-21)
  → 'github:nix-community/home-manager/ec0247a' (2026-01-21)
• Updated input 'homebrew-cask':
    'github:homebrew/homebrew-cask/b6ae83b' (2026-01-21)
  → 'github:homebrew/homebrew-cask/5af875e' (2026-01-22)
• Updated input 'homebrew-core':
    'github:homebrew/homebrew-core/a9cf385' (2026-01-21)
  → 'github:homebrew/homebrew-core/6c8747e' (2026-01-22)
• Updated input 'nix-packages':
    'github:devusb/nix-packages/e9bd15a' (2026-01-19)
  → 'github:devusb/nix-packages/4077276' (2026-01-21)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/203f2dd' (2026-01-21)
  → 'github:nixos/nixpkgs/ad2977c' (2026-01-22)

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

Author: devusb