deps: update flake.lock (#105)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/b1b43d32be000928cc71250ed77f4a0a5f2bc23a?narHash=sha256-8S9n69Dnpg8DhfFlP0YvMGmSOY2X4kImGSPWXYNpaHM%3D' (2025-02-16)
  → 'github:nixos/nixpkgs/dad564433178067be1fbdfcce23b546254b6d641?narHash=sha256-vn285HxnnlHLWnv59Og7muqECNMS33mWLM14soFIv2g%3D' (2025-02-20)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: mrcjkb