flake.lock: Update (#433)

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/dae2f13b6d2a39d1e56df54fabe5c6452ddf6b2a?narHash=sha256-lMWofhJTYhnqvd%2BQzeRb5J58cYGOEI%2BzzqcHybKxkWU%3D' (2024-12-09)
  → 'github:nix-community/neovim-nightly-overlay/dcd1be4d5f9fa160d0c68c1967f4ecc458b01969?narHash=sha256-Xp/rWqO4XXJAqh5c2xju4NCBRpi8lQIknLQmCYfrdWY%3D' (2024-12-10)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/84d9f4f9f9efbfc72630f01f5f837c50fd7020d4?narHash=sha256-Nm%2B9/OZfpb4hayCz/IpAzO2waQimlt%2BkM1fMOM1viWo%3D' (2024-12-08)
  → 'github:neovim/neovim/3bb2d027597107a3d7f84ef61507104fd4dc050a?narHash=sha256-Xtd0YLx6RKJMDu2GfE9geO48Dw3KnpVkfZjUqA51xDw%3D' (2024-12-09)
• Updated input 'neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/929116e316068c7318c54eb4d827f7d9756d5e9c?narHash=sha256-aLJxoTDDSqB%2B/3orsulE6/qdlX6MzDLIITLZqdgMpqo%3D' (2024-12-05)
  → 'github:NixOS/nixpkgs/93dc9803a1ee435e590b02cde9589038d5cc3a4e?narHash=sha256-w0FXPfpGhOihoJDiwMsyN1EzpsXi2F8VQ%2BNVZQSMtys%3D' (2024-12-08)
• Added input 'neovim-nightly/treefmt-nix':
    'github:numtide/treefmt-nix/0ce9d149d99bc383d1f2d85f31f6ebd146e46085?narHash=sha256-s4DalCDepD22jtKL5Nw6f4LP5UwoMcPzPZgHWjAfqbQ%3D' (2024-12-09)
• Added input 'neovim-nightly/treefmt-nix/nixpkgs':
    follows 'neovim-nightly/nixpkgs'
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/dd51f52372a20a93c219e8216fe528a648ffcbf4?narHash=sha256-NQEO/nZWWGTGlkBWtCs/1iF1yl2lmQ1oY/8YZrumn3I%3D' (2024-12-08)
  → 'github:nixos/nixpkgs/bc27f0fde01ce4e1bfec1ab122d72b7380278e68?narHash=sha256-%2B5qdtgXceqhK5ZR1YbP1fAUsweBIrhL38726oIEAtDs%3D' (2024-12-09)

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