flake.lock: Update (#415)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/85dbfc7aaf52ecb755f87e577ddbe6dbbdbc1054?narHash=sha256-iAcj9T/Y%2B3DBy2J0N%2ByF9XQQQ8IEb5swLFzs23CdP88%3D' (2025-08-09)
  → 'github:nixos/nixpkgs/7df7ff7d8e00218376575f0acdcc5d66741351ee?narHash=sha256-gTrEEp5gEspIcCOx9PD8kMaF1iEmfBcTbO0Jag2QhQs%3D' (2025-10-02)
• Updated input 'spectrum':
    'git+https://spectrum-os.org/git/spectrum?ref=refs/heads/main&rev=586577f3015397afacd83bc185454f4cc3c8028f' (2025-08-08)
  → 'git+https://spectrum-os.org/git/spectrum?ref=refs/heads/main&rev=c5d5786d3dc938af0b279c542d1e43bce381b4b9' (2025-10-03)

Author: SuperSandro2000