flake.lock: Update

Flake lock file updates:

• Updated input 'nix-darwin':
    'github:LnL7/nix-darwin/cf297a8d248db6a455b60133f6c0029c04ebe50e' (2024-07-10)
  → 'github:LnL7/nix-darwin/5ce8503cf402cf76b203eba4b7e402bea8e44abc' (2024-07-13)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/249fbde2a178a2ea2638b65b9ecebd531b338cf9' (2024-07-09)
  → 'github:NixOS/nixpkgs/a046c1202e11b62cbede5385ba64908feb7bfac4' (2024-07-11)
• Updated input 'nixpkgs-darwin':
    'github:NixOS/nixpkgs/b1c16f181d04459eae94b3bf38cef5f048034bad' (2024-07-11)
  → 'github:NixOS/nixpkgs/cb5e9b8aa1dd02f95ecb07da813cde693d7f4055' (2024-07-11)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/212defe037698e18fc9521dfe451779a8979844c' (2024-07-11)
  → 'github:NixOS/nixpkgs/8b5a3d5a1d951344d683b442c0739010b80039db' (2024-07-12)