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/0.1.576254%2Brev-ae5c332cbb5827f6b1f02572496b141021de335f/018d4821-953a-717b-b0f9-5a5ba6f94933/source.tar.gz?narHash=sha256-eLihrZAPZX0R6RyM5fYAWeKVNuQPYjAkCUBr%2BJNvtdE%3D' (2024-01-25)