flake.lock: Update

Flake lock file updates:

• Updated input 'nightly':
    'github:nix-community/neovim-nightly-overlay/3454a11f09673a73649b5e8d9be5547f03320780?narHash=sha256-FrJPsAhfn3xRzzAgVrwriY0ROUIQ6pDsSy2U7nVkYFQ%3D' (2024-10-15)
  → 'github:nix-community/neovim-nightly-overlay/97456a48c4784f34e6c7f2f1e5fbde7a145b866a?narHash=sha256-m/wgI/ZWERMrADlk/c2aF/MKIchBghWQ0YUkTqhgDwU%3D' (2024-10-16)
• Updated input 'nightly/neovim-src':
    'github:neovim/neovim/4846bf05dc639592c73135fb6f1a69f410c1c40f?narHash=sha256-IfCfZ4k8foOFOqSHxC0QW7NZx8bXDH2ruySZN4Gqqng%3D' (2024-10-14)
  → 'github:neovim/neovim/82b02ae2f2af439a8c678ed6b55a43121055f279?narHash=sha256-xwFqmvrzzymfE/6NE1g/E2TOOou23Ok08bzLeftfdow%3D' (2024-10-15)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/b69de56fac8c2b6f8fd27f2eca01dcda8e0a4221?narHash=sha256-f0SBJz1eZ2yOuKUr5CA9BHULGXVSn6miBuUWdTyhUhU%3D' (2024-10-10)
  → 'github:nixos/nixpkgs/d4f247e89f6e10120f911e2e2d2254a050d0f732?narHash=sha256-DZBO2465PL5V89e8hFSJewyH4QbCPpW3ssws7ckT/0A%3D' (2024-10-13)