flake.lock: Update

Flake lock file updates:

• Updated input 'nixlib':
    'github:nix-community/nixpkgs.lib/1418bc28a52126761c02dd3d89b2d8ca0f521181?narHash=sha256-tmpqTSWVRJVhpvfSN9KXBvKEXplrwKnSZNAoNPf/S/s%3D' (2025-01-12)
  → 'github:nix-community/nixpkgs.lib/a73b9c743612e4244d865a2fdee11865283c04e6?narHash=sha256-x2rJ%2BOvzq0sCMpgfgGaaqgBSwY%2BLST%2BWbZ6TytnT9Rk%3D' (2025-08-10)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/2f9e2f85cb14a46410a1399aa9ea7ecf433e422e?narHash=sha256-FWlPMUzp0lkQBdhKlPqtQdqmp%2B/C%2B1MBiEytaYfrCTY%3D' (2025-01-12)
  → 'github:NixOS/nixpkgs/6d7ec06d6868ac6d94c371458fc2391ded9ff13d?narHash=sha256-fEvTiU4s9lWgW7mYEU/1QUPirgkn%2BodUBTaindgiziY%3D' (2025-09-13)

Author: github-actions[bot]