flake.lock: Update

Flake lock file updates:

• Updated input 'hercules-ci-effects':
    'github:hercules-ci/hercules-ci-effects/5b6cec51c9ec095a0d3fd4c8eeb53eb5c59ae33e?narHash=sha256-1Z4WPGVky4w3lrhrgs89OKsLzPdtkbi1bPLNFWsoLfY%3D' (2025-04-15)
  → 'github:hercules-ci/hercules-ci-effects/231726642197817d20310b9d39dd4afb9e899489?narHash=sha256-EaAJhwfJGBncgIV/0NlJviid2DP93cTMc9h0q6P6xXk%3D' (2025-05-23)
• Updated input 'nixpkgs':
    'git+https://github.com/NixOS/nixpkgs?ref=nixos-unstable-small&rev=a4b6cee9ab63822643e108f67da016aa800ea099&shallow=1' (2025-05-03)
  → 'git+https://github.com/NixOS/nixpkgs?ref=nixos-unstable-small&rev=c3ee76c437067f1ae09d6e530df46a3f80977992&shallow=1' (2025-05-24)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/29ec5026372e0dec56f890e50dbe4f45930320fd?narHash=sha256-4h3s1L/kKqt3gMDcVfN8/4v2jqHrgLIe4qok4ApH5x4%3D' (2025-05-02)
  → 'github:numtide/treefmt-nix/020cb423808365fa3f10ff4cb8c0a25df35065a3?narHash=sha256-XgxghfND8TDypxsMTPU2GQdtBEsHTEc3qWE6RVEk8O0%3D' (2025-05-22)

Author: github-actions[bot]