flake.lock: Update (#443)

Flake lock file updates:

• Updated input 'git-hooks':
    'github:cachix/git-hooks.nix/0ddd26d0925f618c3a5d85a4fa5eb1e23a09491d?narHash=sha256-nzE5UbJ41aPEKf8R2ZFYtLkqPmF7EIUbNEdHMBLg0Ig%3D' (2024-12-17)
  → 'github:cachix/git-hooks.nix/f0f0dc4920a903c3e08f5bdb9246bb572fcae498?narHash=sha256-ulZN7ps8nBV31SE%2BdwkDvKIzvN6hroRY8sYOT0w%2BE28%3D' (2024-12-21)
• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/57e5021f82590f4c6ac0a220ac8787bc28e0a94d?narHash=sha256-hXt72ZmJeu7gv3cCIEDwY892xe0U9bin6LIXwjXlQ7U%3D' (2024-12-21)
  → 'github:nix-community/neovim-nightly-overlay/9b76a3d348f8687f1d863fe7db722fbdff618df0?narHash=sha256-zWVO1JQKqaH6i2zj9BiZzwuixb6GM0k%2BUvzHNQtFfcg%3D' (2024-12-22)
• Updated input 'neovim-nightly/git-hooks':
    'github:cachix/git-hooks.nix/0ddd26d0925f618c3a5d85a4fa5eb1e23a09491d?narHash=sha256-nzE5UbJ41aPEKf8R2ZFYtLkqPmF7EIUbNEdHMBLg0Ig%3D' (2024-12-17)
  → 'github:cachix/git-hooks.nix/f0f0dc4920a903c3e08f5bdb9246bb572fcae498?narHash=sha256-ulZN7ps8nBV31SE%2BdwkDvKIzvN6hroRY8sYOT0w%2BE28%3D' (2024-12-21)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/e1c2179dd93ed2cd787b1cd016606b1901a1acfe?narHash=sha256-isblUJ6somE7siX9YVZuy6FNLJTBtkgK1shmEqrm7dI%3D' (2024-12-20)
  → 'github:neovim/neovim/fd05c7f19d942edce39a2c99b5c064b71e66bc31?narHash=sha256-33cvzFskIECPyDBmwwegyuQE%2Bifc7sTCqmlS6hOnun8%3D' (2024-12-21)

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