flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/3b426df85fb2edc0da26673c464709e9c8b0c654?narHash=sha256-A6rw8kgxTDmuGD6D8kooF9V%2B%2BiAeXXgqay0vKG/zi/M%3D' (2024-09-13)
  → 'github:nix-community/neovim-nightly-overlay/2da0565b4fa221f7a62e9cafa019cd00b99fdb9e?narHash=sha256-v4DneIggoLBdypeghj4rMzYngKZ1FgDtYKaYDBkfShk%3D' (2024-09-14)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/deac7df80a1491ae65b68a1a1047902bcd775adc?narHash=sha256-Vu2rOpAKlEFu%2BdGewEBsnAuHHxj8XbGqF52WGmu1NNY%3D' (2024-09-12)
  → 'github:neovim/neovim/67d6b6f27ed3016a2daf6037879d77becc2cfa8f?narHash=sha256-n2kXazdrh5%2BIvCZFrUq4z27n%2BOX70S6UPHxAI0pBg0w%3D' (2024-09-13)
• Updated input 'neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/111ed8812c10d7dc3017de46cbf509600c93f551?narHash=sha256-Ji5wO1lLG99grI0qCRb6FyRPpH9tfdfD1QP/r7IlgfM%3D' (2024-09-12)
  → 'github:NixOS/nixpkgs/673d99f1406cb09b8eb6feab4743ebdf70046557?narHash=sha256-tI7141IHDABMNgz4iXDo8agCp0SeTLbaIZ2DRndwcmk%3D' (2024-09-13)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/673d99f1406cb09b8eb6feab4743ebdf70046557?narHash=sha256-tI7141IHDABMNgz4iXDo8agCp0SeTLbaIZ2DRndwcmk%3D' (2024-09-13)
  → 'github:nixos/nixpkgs/e3e53b69ed45a126b968645b7303288c0b5d9a6b?narHash=sha256-xXYD%2BnOQWo2i5HrhF0KUQ8CWsaixfQz67MgnMfLTZKM%3D' (2024-09-13)