flake.lock: Update (#322)

Flake lock file updates:

• Updated input 'neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/585d8caecf1561bec33529f2f890b234d8c5dabb?narHash=sha256-vPk1MWy3atw4OxFWXdGpeLwqmx87Ph/qdAsGn7e1cy4%3D' (2024-08-09)
  → 'github:nix-community/neovim-nightly-overlay/f019c7b0e7f478e4aaf2b406785a8d6ec6d1957d?narHash=sha256-4%2B%2BqlOlqMoZz3h/g48f%2BTY3r75h%2BEBToRNmgcVWKpsE%3D' (2024-08-13)
• Updated input 'neovim-nightly/git-hooks':
    'github:cachix/git-hooks.nix/3c977f1c9930f54066c085305b4b2291385e7a73?narHash=sha256-YpzywjTAUHRRHcO8zz9x2gYqJ0JmZlcB9%2BRaUvD89qM%3D' (2024-08-07)
  → 'github:cachix/git-hooks.nix/c7012d0c18567c889b948781bc74a501e92275d1?narHash=sha256-qbhjc/NEGaDbyy0ucycubq4N3//gDFFH3DOmp1D3u1Q%3D' (2024-08-09)
• Updated input 'neovim-nightly/neovim-src':
    'github:neovim/neovim/b9913191be0b4884d92db794e2eb92641523a415?narHash=sha256-W1Jz/sINvHUXqZIGqCoZutW7U5fDCG2xI1IcX5UjIbI%3D' (2024-08-08)
  → 'github:neovim/neovim/9768e88f3891b5594eb2d556bd3bdf40c61d46e1?narHash=sha256-Tt%2BUtP3iSQATu2CUgFgtPkobASE7Rbf2AWZeLH8fthU%3D' (2024-08-12)
• Updated input 'neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/f5129fb42b9c262318130a97b47516946da3e7d7?narHash=sha256-O/kxmybNecC3Efr6ITOdtCzFv90/B2Iiedavj5aRWt0%3D' (2024-08-07)
  → 'github:NixOS/nixpkgs/154bcb95ad51bc257c2ce4043a725de6ca700ef6?narHash=sha256-7pjpeQlZUNQ4eeVntytU3jkw9dFK3k1Htgk2iuXjaD8%3D' (2024-08-09)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/13fe00cb6c75461901f072ae62b5805baef9f8b2?narHash=sha256-9AVY0ReCmSGXHrlx78%2B1RrqcDgVSRhHUKDVV1LLBy28%3D' (2024-08-08)
  → 'github:nixos/nixpkgs/19674872444bb3e0768249e724d99c8649c3bd78?narHash=sha256-U5gKtbKuPahB02iGeGHFPlKr/HqrvSsHlEDEXoVyaPc%3D' (2024-08-13)

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