feat: update flake.lock (#106)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/01f116e4df6a15f4ccdffb1bcd41096869fb385c?narHash=sha256-f/QCJM/YhrV/lavyCVz8iU3rlZun6d%2BdAiC3H%2BCDle4%3D' (2025-10-22)
  → 'github:nixos/nixpkgs/2fb006b87f04c4d3bdf08cfdbc7fab9c13d94a15?narHash=sha256-kJ8lIZsiPOmbkJypG%2BB5sReDXSD1KGu2VEPNqhRa/ew%3D' (2025-10-31)

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Author: github-actions[bot]