flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/2cccadc7357c0ba201788ae99c4dfa90728ef5e0?narHash=sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q%3D' (2025-11-21)
  → 'github:hercules-ci/flake-parts/a34fae9c08a15ad73f295041fec82323541400a9?narHash=sha256-XswHlK/Qtjasvhd1nOa1e8MgZ8GS//jBoTqWtrS1Giw%3D' (2025-12-15)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/719359f4562934ae99f5443f20aa06c2ffff91fc?narHash=sha256-b0yj6kfvO8ApcSE%2BQmA6mUfu8IYG6/uU28OFn4PaC8M%3D' (2025-10-29)
  → 'github:nix-community/nixpkgs.lib/2075416fcb47225d9b68ac469a5c4801a9c4dd85?narHash=sha256-k00uTP4JNfmejrCLJOwdObYC9jHRrr/5M/a/8L2EIdo%3D' (2025-12-14)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/050e09e091117c3d7328c7b2b7b577492c43c134?narHash=sha256-HzxeGVID5MChuCPESuC0dlQL1/scDKu%2BMmzoVBJxulM%3D' (2025-11-22)
  → 'github:NixOS/nixpkgs/cd81579bbcc2d6885fa0c5cf8416e3bf8bf3e27e?narHash=sha256-Rj6PPGGhYdlKWqYyqZmFHgUs5i2KEVq/zpHHwp4kR9A%3D' (2025-12-19)

Author: nim65s