chore: update flake.lock

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/af66ad1' (2025-08-06)
  → 'github:hercules-ci/flake-parts/2cccadc' (2025-11-21)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/0f36c44' (2025-07-27)
  → 'github:nix-community/nixpkgs.lib/719359f' (2025-10-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/620f256' (2025-08-31)
  → 'github:NixOS/nixpkgs/60d40a8' (2025-11-22)
• Updated input 'pre-commit-hooks-nix':
    'github:cachix/pre-commit-hooks.nix/e891a93' (2025-08-23)
  → 'github:cachix/pre-commit-hooks.nix/20e71a4' (2025-11-21)

Author: github-actions[bot]