flake.lock: Update (#483)

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/9fb5bc0eff86f8bad827f9f3d17d76789d28643b?narHash=sha256-oIhU2SGZnCX7fqFg0ZmnpXhUggRogkVr6cqcH1PXDZ8%3D' (2025-02-03)
  → 'github:nix-community/neovim-nightly-overlay/9a95d2aa820df2b596af18f2a5ca37873a3d2695?narHash=sha256-gKPFP/hWRwR%2BrkpXMoDnXZDZMqKnUwIBDnYH8FpgNNU%3D' (2025-02-04)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/87e806186c721f12c338af86677b6d1e6e2fa44a?narHash=sha256-BbtORMMsvCyobInYJdCiIvUuhK9PXH1gBEJhKjEMFTQ%3D' (2025-02-02)
  → 'github:neovim/neovim/5a7cf85c2c7e452563a4bce9195e9a3426ca3050?narHash=sha256-aZUwhRP5jBEZ1AaafBQ7FjV8XicyAkWh6Vhx94j53Ik%3D' (2025-02-03)
• Updated input 'neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/102a39bfee444533e6b4e8611d7e92aa39b7bec1?narHash=sha256-Q4vhtbLYWBUnjWD4iQb003Lt%2BN5PuURDad1BngGKdUs%3D' (2025-02-01)
  → 'github:NixOS/nixpkgs/2d31b9476b7c6f5b029e595586b0b112a7ad130b?narHash=sha256-HrrsuYIOl14dreCDUsXQGrWxdiU8LPKxcIo759jUk6Q%3D' (2025-02-03)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/2d31b9476b7c6f5b029e595586b0b112a7ad130b?narHash=sha256-HrrsuYIOl14dreCDUsXQGrWxdiU8LPKxcIo759jUk6Q%3D' (2025-02-03)
  → 'github:nixos/nixpkgs/f7384aacd0ecd28681a99269ac0dff2c3a805d63?narHash=sha256-1MABVDwNpAUrUDvyM6PlHlAB1eTWAX0eNYCzdsZ54NI%3D' (2025-02-04)

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