flake.lock: Update

Flake lock file updates:

• Updated input 'nightly':
    'github:nix-community/neovim-nightly-overlay/cddd55515fe5f8c5af730838583a0c68759c4fd3?narHash=sha256-XexksBtvDiT3J1JaA3JSXvPvd40mU6tsf1GsE6mceqA%3D' (2024-11-18)
  → 'github:nix-community/neovim-nightly-overlay/2a9b9e821c7f91eb6ae540925a453f9ebacd0513?narHash=sha256-v17KxlCf0O7hoD9AjiF94T2nuZuh7ZREyI6Ww/Tr4R0%3D' (2024-11-19)
• Updated input 'nightly/neovim-src':
    'github:neovim/neovim/965dc81f818e50b5078d4b7efa5fbb8b771560f8?narHash=sha256-Fyve6sUYgL0VcPgMysOIJIDVuAHcgTeXB8kLwx6rB5c%3D' (2024-11-17)
  → 'github:neovim/neovim/989a37a594649528f28432388c0e7e28e8be2753?narHash=sha256-ZXZInL8J38JaVpglSPa78ptn1zlqbaRHDtpa73CqpfI%3D' (2024-11-18)
• Updated input 'nightly/nixpkgs':
    'github:NixOS/nixpkgs/c69a9bffbecde46b4b939465422ddc59493d3e4d?narHash=sha256-ddcX4lQL0X05AYkrkV2LMFgGdRvgap7Ho8kgon3iWZk%3D' (2024-11-16)
  → 'github:NixOS/nixpkgs/5083ec887760adfe12af64830a66807423a859a7?narHash=sha256-D1FNZ70NmQEwNxpSSdTXCSklBH1z2isPR84J6DQrJGs%3D' (2024-11-18)