flake.lock: Update

Flake lock file updates:

• Updated input 'flox-main':
    'git+https://github.com/flox/flox?ref=refs/heads/main&rev=b4b14e86229843bb68462e00425d5939c82fbded' (2024-01-02)
  → 'git+https://github.com/flox/flox?ref=refs/heads/main&rev=4f7ceb58462a198e9cee3c18c41033b0089ab71f' (2024-01-03)
• Updated input 'nixpkgs':
    'github:flox/nixpkgs-flox/888ffabdc1c6c3a83df0fa135e7bcb230ea362bd' (2024-01-03)
  → 'github:flox/nixpkgs-flox/39a85c67d4b48bfa411d6353181f1818b3ffb998' (2024-01-04)
• Updated input 'nixpkgs/nixpkgs__flox__aarch64-linux':
    'github:flox/nixpkgs-flox/790d852612369906d5ebca8438ab7f324d200675' (2024-01-03)
  → 'github:flox/nixpkgs-flox/6d55e55f1d8ee62c784ba586c60cd24eaf850ef8' (2024-01-04)