flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/644e0fc48951a860279da645ba77fe4a6e814c5e?narHash=sha256-TVcTNvOeWWk1DXljFxVRp%2BE0tzG1LhrVjOGGoMHuXio%3D' (2025-07-21)
  → 'github:hercules-ci/flake-parts/af66ad14b28a127c5c0f3bbb298218fc63528a18?narHash=sha256-pHYj8gUBapuUzKV/kN/tR3Zvqc7o6gdFB9XKXIp1SQ8%3D' (2025-08-06)
• Updated input 'haskell-flake':
    'github:srid/haskell-flake/72a74b6ac9cda796e43d39643e818be94f35047f?narHash=sha256-StyB4UPW3lDXSlzwbMGl4Sd3n%2BGc%2BkkAKfzniF0JGaU%3D' (2025-07-20)
  → 'github:srid/haskell-flake/73e3891fb135c679a1c30fae4b101e5b41b8ca61?narHash=sha256-%2B99fEAk0HwjYgIW2tEOs7ayBDxnU9NAM5E29ZxgyX40%3D' (2025-08-31)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/1c3ce1e240626bf84775aa62fa8eaf5e75e0997b?narHash=sha256-nlnPqKhWGbqOjcLDJvRgtLZYvCM3D7Dwk6CkPvM/6MY%3D' (2025-07-26)
  → 'github:nixos/nixpkgs/5c37a1b3ce137a19d73926fed368d087d8a2d1e2?narHash=sha256-nUhDEL6as6UqFfe7qFmu7btWlI9xwAzFR2yMRqsYFVA%3D' (2025-09-01)

Author: github-actions[bot]