chore: update flake.lock (#494)

Automated changes by the
[update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock)
GitHub Action.

```
Flake lock file updates:

• Updated input 'neorocks':
    'github:nvim-neorocks/neorocks/45256066b8c16aed008d8efe6174bf57d9cb9aa9?narHash=sha256-JyOOLUzrdazjA2BIMmHrbX5Cd2ifi3ItoUC1yqpQCng%3D' (2025-07-19)
  → 'github:nvim-neorocks/neorocks/38d803ac8b6fae7a85531822a5baad11d18e7e37?narHash=sha256-6YlNKq7F/pqGbBbmSLRMl7adLTnA9MnbMeSvC3JxRIs%3D' (2025-07-26)
• Updated input 'neorocks/flake-parts':
    'github:hercules-ci/flake-parts/77826244401ea9de6e3bac47c2db46005e1f30b5?narHash=sha256-Tyw1RjYEsp5scoigs1384gIg6e0GoBVjms4aXFfRssQ%3D' (2025-07-01)
  → 'github:hercules-ci/flake-parts/644e0fc48951a860279da645ba77fe4a6e814c5e?narHash=sha256-TVcTNvOeWWk1DXljFxVRp%2BE0tzG1LhrVjOGGoMHuXio%3D' (2025-07-21)
• Updated input 'neorocks/neovim-nightly':
    'github:nix-community/neovim-nightly-overlay/053ea16d7d94f21ee6ed0b70007cd4378c8e4825?narHash=sha256-EiCUyqaoTdXDMBFb30hBKB9Sx3eY9mrqhgGriIsKuIU%3D' (2025-07-17)
  → 'github:nix-community/neovim-nightly-overlay/7839118449917342475f97fdc1d211f2a5ed9e2f?narHash=sha256-qEcLWbQNYqMkkvLanbVo2onQUMZ%2Bq/xEchU4MmfRm9M%3D' (2025-07-26)
• Updated input 'neorocks/neovim-nightly/flake-parts':
    'github:hercules-ci/flake-parts/77826244401ea9de6e3bac47c2db46005e1f30b5?narHash=sha256-Tyw1RjYEsp5scoigs1384gIg6e0GoBVjms4aXFfRssQ%3D' (2025-07-01)
  → 'github:hercules-ci/flake-parts/644e0fc48951a860279da645ba77fe4a6e814c5e?narHash=sha256-TVcTNvOeWWk1DXljFxVRp%2BE0tzG1LhrVjOGGoMHuXio%3D' (2025-07-21)
• Updated input 'neorocks/neovim-nightly/neovim-src':
    'github:neovim/neovim/fcec1610e7ba501be812f636dabc7d9f4c8f436f?narHash=sha256-h/td8ApD44htLyMnue39Y882fs1VpV/oy21WiySmXDE%3D' (2025-07-16)
  → 'github:neovim/neovim/5de2ec76a3b01030e81b37244281c05469cff895?narHash=sha256-2pGQ7btkQuVl6ksRXjucoaDOcjMLgj67YHTLH3SDi2I%3D' (2025-07-25)
• Updated input 'neorocks/neovim-nightly/nixpkgs':
    'github:NixOS/nixpkgs/dab3a6e781554f965bde3def0aa2fda4eb8f1708?narHash=sha256-lFNVsu/mHLq3q11MuGkMhUUoSXEdQjCHvpReaGP1S2k%3D' (2025-07-15)
  → 'github:NixOS/nixpkgs/0d00f23f023b7215b3f1035adb5247c8ec180dbc?narHash=sha256-7XG/QBqhrYOyA2houjRTL2NMa7IKZZ/somBqr%2BQ/6Wo%3D' (2025-07-24)
• Updated input 'neorocks/neovim-nightly/treefmt-nix':
    'github:numtide/treefmt-nix/c9d477b5d5bd7f26adddd3f96cfd6a904768d4f9?narHash=sha256-19m7P4O/Aw/6%2BCzncWMAJu89JaKeMh3aMle1CNQSIwM%3D' (2025-07-09)
  → 'github:numtide/treefmt-nix/2673921c03d6e75fdf4aa93e025772608d1482cf?narHash=sha256-Bv9h1AJegLI8uAhiJ1sZ4XAndYxhgf38tMgCQwiEpmc%3D' (2025-07-25)
• Updated input 'neorocks/nixpkgs':
    'github:nixos/nixpkgs/8131c0ea9df6293a247be743a387ff725e464db7?narHash=sha256-pGvcN/yiJ4e3/hgvTwkyZvl6c3HuLLCY/hjEzDuQB54%3D' (2025-07-18)
  → 'github:nixos/nixpkgs/0d00f23f023b7215b3f1035adb5247c8ec180dbc?narHash=sha256-7XG/QBqhrYOyA2houjRTL2NMa7IKZZ/somBqr%2BQ/6Wo%3D' (2025-07-24)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/6b4955211758ba47fac850c040a27f23b9b4008f?narHash=sha256-dPALCtmik9Wr14MGqVXm%2BOQcv7vhPBXcWNIOThGnB/Q%3D' (2025-07-19)
  → 'github:nixos/nixpkgs/6027c30c8e9810896b92429f0092f624f7b1aace?narHash=sha256-cnL5WWn/xkZoyH/03NNUS7QgW5vI7D1i74g48qplCvg%3D' (2025-07-25)
```

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Author: mrcjkb