flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/7f5ed8f34dbb092799ac490d1235be0513646dba?narHash=sha256-1Mhdqza7WIdExqoeVWOLOZKM0qd/0mv137ScLrsk73A%3D' (2024-12-29)
  → 'github:nix-community/neovim-nightly-overlay/fd381a5a19f553c2466dc437fb94fcf799d77e82?narHash=sha256-ibHgAkr8OXAP8MRBo4Z7AIaVdOHywGR2J8R50vZCQjI%3D' (2024-12-30)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/2b07b14eacf3197754c63f42f9c880e85960eef2?narHash=sha256-e1KLj%2B283Znt14U9DkKw%2BzPqShe0AkFPGpT44BhZ9KU%3D' (2024-12-28)
  → 'github:neovim/neovim/e4bc8b5967d22840c1e52c97acab0f77107cd48c?narHash=sha256-PMeWazyxGxpA6UeVrWH/ur8WuqliGxXlRjTTQdMiYVc%3D' (2024-12-29)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/7cc0bff31a3a705d3ac4fdceb030a17239412210?narHash=sha256-7QEFnKkzD13SPxs%2BUFR5bUFN2fRw%2BGlL0am72ZjNre4%3D' (2024-12-27)
  → 'github:nixos/nixpkgs/9e09ce2d47c7700b877becef99ce7e27f15604dc?narHash=sha256-UHRbyEPjyMWNP/T3SaVNuyO5j4eVdzP9ofogbYxt3bc%3D' (2024-12-28)