feat: update flake.lock (#94)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/94def634a20494ee057c76998843c015909d6311?narHash=sha256-K2ViRJfdVGE8tpJejs8Qpvvejks1%2BA4GQej/lBk5y7I%3D' (2025-07-31)
  → 'github:nixos/nixpkgs/c2ae88e026f9525daf89587f3cbee584b92b6134?narHash=sha256-erbiH2agUTD0Z30xcVSFcDHzkRvkRXOQ3lb887bcVrs%3D' (2025-08-06)

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

Author: github-actions[bot]