flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.533189%2Brev-87828a0e03d1418e848d3dd3f3014a632e4a4f64/018b0dc8-e84f-7c59-b5d6-16849c3b2074/source.tar.gz?narHash=sha256-YXUNI0kLEcI5g8lqGMb0nh67fY9f2YoJsILafh6zlMo%3D' (2023-10-06)
  → 'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.578631%2Brev-b8b232ae7b8b144397fdb12d20f592e5e7c1a64d/018d6a7d-21b4-7935-bdaf-4c8682c7e5b1/source.tar.gz?narHash=sha256-hqJlyJk4MRpcItGYMF%2B3uHe8HvxNETWvlGtLuVpqLU0%3D' (2024-01-31)