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/0.1.573276%2Brev-bbe7d8f876fbbe7c959c90ba2ae2852220573261/018d28dc-8ce1-71b2-b752-28895ab7bbcb/source.tar.gz?narHash=sha256-eyM3okYtMgYDgmYukoUzrmuoY4xl4FUujnsv/P6I/zI%3D' (2024-01-19)