flake.lock: Update

Flake lock file updates:

• Updated input 'hercules-ci-effects':
    'github:hercules-ci/hercules-ci-effects/f6233b5cfbada692d93a73d6ed35bdbfd0fdb9c4?narHash=sha256-cwk53OX1S1bCFY09zydubZNmmwcx9l5XEba8mVYuNE4%3D' (2025-01-01)
  → 'github:hercules-ci/hercules-ci-effects/afd0a42e8c61ebb56899315ee4084a8b2e4ff425?narHash=sha256-JTBWmyGf8K1Rwb%2BgviHIUzRJk/sITtT%2B72HXFkTZUjo%3D' (2025-01-15)
• Updated input 'nixpkgs':
    'git+https://github.com/NixOS/nixpkgs?ref=nixos-unstable-small&rev=629ab9db28ab2b24e444472b6d3f512553843b42&shallow=1' (2025-01-14)
  → 'git+https://github.com/NixOS/nixpkgs?ref=nixos-unstable-small&rev=2fc5aeb049f44ed4f9e877cda8a1c334612e1d7a&shallow=1' (2025-01-22)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/13c913f5deb3a5c08bb810efd89dc8cb24dd968b?narHash=sha256-p2r8xhQZ3TYIEKBoiEhllKWQqWNJNoT9v64Vmg4q8Zw%3D' (2025-01-06)
  → 'github:numtide/treefmt-nix/f2cc121df15418d028a59c9737d38e3a90fbaf8f?narHash=sha256-5An1wq5U8sNycOBBg3nsDDgpwBmR9liOpDGlhliA6Xo%3D' (2025-01-21)

Author: github-actions[bot]