flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/c621e8422220273271f52058f618c94e405bb0f5' (2025-04-01)
  → 'github:hercules-ci/flake-parts/644e0fc48951a860279da645ba77fe4a6e814c5e' (2025-07-21)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/e4822aea2a6d1cdd36653c134cacfd64c97ff4fa' (2025-03-30)
  → 'github:nix-community/nixpkgs.lib/14a40a1d7fb9afa4739275ac642ed7301a9ba1ab' (2025-06-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/063f43f2dbdef86376cc29ad646c45c46e93234c' (2025-05-23)
  → 'github:NixOS/nixpkgs/7fd36ee82c0275fb545775cc5e4d30542899511d' (2025-07-25)

Author: github-actions[bot]