flake.lock: Update (#15)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/cf59864ef8aa2e178cccedbe2c178185b0365705?narHash=sha256-izhTDFKsg6KeVBxJS9EblGeQ8y%2BO8eCa6RcW874vxEc%3D' (2026-03-02)
  → 'github:NixOS/nixpkgs/aca4d95fce4914b3892661bcb80b8087293536c6?narHash=sha256-E1bxHxNKfDoQUuvriG71%2Bf%2Bs/NT0qWkImXsYZNFFfCs%3D' (2026-03-06)

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

Author: jetcookies