build(deps): update flake.lock

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 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/14a40a1d7fb9afa4739275ac642ed7301a9ba1ab?narHash=sha256-urW/Ylk9FIfvXfliA1ywh75yszAbiTEVgpPeinFyVZo%3D' (2025-06-29)
  → 'github:nix-community/nixpkgs.lib/0f36c44e01a6129be94e3ade315a5883f0228a6e?narHash=sha256-zvaMGVn14/Zz8hnp4VWT9xVnhc8vuL3TStRqwk22biA%3D' (2025-07-27)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/dc9637876d0dcc8c9e5e22986b857632effeb727?narHash=sha256-cKgvtz6fKuK1Xr5LQW/zOUiAC0oSQoA9nOISB0pJZqM%3D' (2025-07-28)
  → 'github:NixOS/nixpkgs/fbcf476f790d8a217c3eab4e12033dc4a0f6d23c?narHash=sha256-wNO3%2BKs2jZJ4nTHMuks%2BcxAiVBGNuEBXsT29Bz6HASo%3D' (2025-08-14)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/b372cf71b4125d420d7648cbd898ab8f5c355be2?narHash=sha256-3okLvry8fRWZhJZP75pPC9P6U1dcu84VOCPhPLXYozI%3D' (2025-07-29)
  → 'github:oxalica/rust-overlay/4abaeba6b176979be0da0195b9e4ce86bc501ae4?narHash=sha256-i7Rgs943NqX0RgQW0/l1coi8eWBj3XhxVggMpjjzTsk%3D' (2025-08-15)

Author: github-actions[bot]