flake.lock: Update

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/d2284184c177b5a865843134cd9e27bc323c502f?narHash=sha256-3CwpmafTs1NKrPz6weG%2B1joBMu6anpkbUd/DBjFoyDc%3D' (2024-09-19)
  → 'github:nix-community/neovim-nightly-overlay/25aca068d0bd63c6db17c29bd3641256ea62a2c1?narHash=sha256-eXI81wCtybqgK05ky5/tmj4AZDKmtoNQcGZEX0vnoe8%3D' (2024-09-20)
• Updated input 'neovim-nightly/git-hooks':
    'github:cachix/git-hooks.nix/7570de7b9b504cfe92025dd1be797bf546f66528?narHash=sha256-tyMUA6NgJSvvQuzB7A1Sf8%2B0XCHyfSPRx/b00o6K0uo%3D' (2024-09-05)
  → 'github:cachix/git-hooks.nix/4e743a6920eab45e8ba0fbe49dc459f1423a4b74?narHash=sha256-D5AegvGoEjt4rkKedmxlSEmC%2BnNLMBPWFxvmYnVLhjk%3D' (2024-09-19)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/0ba388847417b8aed469976acf94f9633cb03f15?narHash=sha256-AO6Q1/MmcYinTakwCG75aoZYkaRuEGIfhjtd7I7TToU%3D' (2024-09-18)
  → 'github:neovim/neovim/f01c764cc6f82399edfa0d47a7bafbf7c95e2747?narHash=sha256-SMRChiJK6Td%2BTtiphiXP%2Bfc8ZNElfmAeHTF2y2y9y9w%3D' (2024-09-19)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/658e7223191d2598641d50ee4e898126768fe847?narHash=sha256-zACxiQx8knB3F8%2BZe%2B1BpiYrI%2BCbhxyWpcSID9kVhkQ%3D' (2024-09-17)
  → 'github:nixos/nixpkgs/268bb5090a3c6ac5e1615b38542a868b52ef8088?narHash=sha256-xB35C2fpz7iyNcj9sn0a%2BwM2C4CQ6DGTn5VUHogstYs%3D' (2024-09-19)