flake.lock: Update (#163)

Flake lock file updates:

• Updated input 'neorocks':
    'github:nvim-neorocks/neorocks/dc5604b39c35ab09edecacb9f2bbbbff5a71b60b' (2024-05-07)
  → 'github:nvim-neorocks/neorocks/c6c64599be04702d2fbc59af27281560745a129a' (2024-05-11)
• Updated input 'neorocks/neovim-nightly':
    'github:neovim/neovim/d40b0a96c4f65da7e02194c94a2c1de79cecaf81?dir=contrib' (2024-05-06)
  → 'github:neovim/neovim/8c7a8be27437d8f2d640daf1c2598d4c18933e04?dir=contrib' (2024-05-11)
• Updated input 'neorocks/nixpkgs':
    'github:nixos/nixpkgs/ad7efee13e0d216bf29992311536fce1d3eefbef' (2024-05-06)
  → 'github:nixos/nixpkgs/cc6431d5598071f0021efc6c009c79e5b5fe1617' (2024-05-09)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/ad7efee13e0d216bf29992311536fce1d3eefbef' (2024-05-06)
  → 'github:nixos/nixpkgs/e4e7a43a9db7e22613accfeb1005cca1b2b1ee0d' (2024-05-11)

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