flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/a34fae9c08a15ad73f295041fec82323541400a9?narHash=sha256-XswHlK/Qtjasvhd1nOa1e8MgZ8GS//jBoTqWtrS1Giw%3D' (2025-12-15)
  → 'github:hercules-ci/flake-parts/250481aafeb741edfe23d29195671c19b36b6dca?narHash=sha256-feveD98mQpptwrAEggBQKJTYbvwwglSbOv53uCfH9PY%3D' (2026-01-05)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/f03e59b1111c68b721b20bb72ee7d7e079d38a0f?narHash=sha256-JuS4ucoXQOfaNDVL47oTHp%2BnRCI3OwlAhpOINCixdhw%3D' (2025-12-20)
  → 'github:NixOS/nixpkgs/ac62194c3917d5f474c1a844b6fd6da2db95077d?narHash=sha256-16KkgfdYqjaeRGBaYsNrhPRRENs0qzkQVUooNHtoy2w%3D' (2026-01-02)
• Updated input 'pre-commit':
    'github:cachix/git-hooks.nix/b68b780b69702a090c8bb1b973bab13756cc7a27?narHash=sha256-t3T/xm8zstHRLx%2BpIHxVpQTiySbKqcQbK%2Br%2B01XVKc0%3D' (2025-12-16)
  → 'github:cachix/git-hooks.nix/f0927703b7b1c8d97511c4116eb9b4ec6645a0fa?narHash=sha256-6MkqajPICgugsuZ92OMoQcgSHnD6sJHwk8AxvMcIgTE%3D' (2026-01-01)
• Updated input 'pre-commit/flake-compat':
    'github:edolstra/flake-compat/f387cd2afec9419c8ee37694406ca490c3f34ee5?narHash=sha256-XKUZz9zewJNUj46b4AJdiRZJAvSZ0Dqj2BNfXvFlJC4%3D' (2025-10-27)
  → 'github:NixOS/flake-compat/5edf11c44bc78a0d334f6334cdaf7d60d732daab?narHash=sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns%3D' (2025-12-29)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/66bb33fdfb50b1ee724381c3f5d6012dac6c89b3?narHash=sha256-f1L1rCEu2Zew6zdiZ38jJDZd65ktE7UN%2BGqn2LHPiFI%3D' (2025-12-20)
  → 'github:oxalica/rust-overlay/312b4371e72f644ffcff25b23615195e3b390643?narHash=sha256-HFFVQaux1JoOjEvgBT0ASk1Je%2BjsipyO5c91FoLMed8%3D' (2026-01-10)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/42d96e75aa56a3f70cab7e7dc4a32868db28e8fd?narHash=sha256-%2BcqN4PJz9y0JQXfAK5J1drd0U05D5fcAGhzhfVrDlsI%3D' (2025-12-17)
  → 'github:numtide/treefmt-nix/0c445aa21b01fd1d4bb58927f7b268568af87b20?narHash=sha256-b2gJDJfi%2BTbA7Hu2sKip%2B1mWqya0GJaWrrXQjpbOVTU%3D' (2026-01-10)

Author: github-actions[bot]