Dependencies: Update nixpkgs and nixos-hardware (kernel 6.4.9)

Flake lock file updates:

• Updated input 'nixos-hardware':
    'github:NixOS/nixos-hardware/f0984a5a303659bc9b73895c82a85fdfae40b87a' (2023-07-10)
  → 'github:NixOS/nixos-hardware/430a56dd16fe583a812b2df44dca002acab2f4f6' (2023-08-12)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/408c0e8c15a1c9cf5c3226931b6f283c9867c484' (2023-07-09)
  → 'github:NixOS/nixpkgs/ce5e4a6ef2e59d89a971bc434ca8ca222b9c7f5e' (2023-08-10)

Author: networkException