flake.lock: Update (#1872)

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

```
Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/758cf7296bee11f1706a574c77d072b8a7baa881?narHash=sha256-wfG0S7pltlYyZTM%2BqqlhJ7GMw2fTF4mLKCIVhLii/4M%3D' (2025-10-01)
  → 'github:hercules-ci/flake-parts/4e627ac2e1b8f1de7f5090064242de9a259dbbc8?narHash=sha256-lbHQ7FXGzt6/IygWvJ1lCq%2BTxcut3xYYd6VIpF1ojkg%3D' (2025-10-18)
• Updated input 'git-hooks-nix':
    'github:cachix/git-hooks.nix/46d55f0aeb1d567a78223e69729734f3dca25a85?narHash=sha256-WftxJgr2MeDDFK47fQKywzC72L2jRc/PWcyGdjaDzkw%3D' (2025-10-13)
  → 'github:cachix/git-hooks.nix/ca5b894d3e3e151ffc1db040b6ce4dcc75d31c37?narHash=sha256-BflA6U4AM1bzuRMR8QqzPXqh8sWVCNDzOdsxXEguJIc%3D' (2025-10-17)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/db25466bd95abdbe3012be2900a5562fcfb95d51?narHash=sha256-E9D5sWHmPCmWsrCB3Jogvr/7ODiVaKynDrOpG4ba2tI%3D' (2025-10-14)
  → 'github:NixOS/nixpkgs/0a7d6b8a728a1aafce8bbdecad8fc25408db5fc4?narHash=sha256-6rxQDKJHcrQ70W9W%2BZ9K5ZIUbvsNZ2wa6OYe/jqp5iE%3D' (2025-10-18)
• Updated input 'released-nix-unstable':
    'github:nixos/nix/1fb4ff8c0ecfda9ee30977f08b191f5cda2de9ef?narHash=sha256-1PxNr8pIpt7aQvZP4NSwA535nYGOwmS6YcizHcdZveU%3D' (2025-10-14)
  → 'github:nixos/nix/b56e456b0df97b53fc889c441c6713c580bf4657?narHash=sha256-Kdt%2BH3F5jkJNJQ7BTErshMXkR2KJ11ZK6bxAJ9vTn04%3D' (2025-10-18)
• Updated input 'released-nixpkgs-stable':
    'github:NixOS/nixpkgs/7e297ddff44a3cc93673bb38d0374df8d0ad73e4?narHash=sha256-4xggC56Rub3WInz5eD7EZWXuLXpNvJiUPahGtMkwtuc%3D' (2025-10-10)
  → 'github:NixOS/nixpkgs/98ff3f9af2684f6136c24beef08f5e2033fc5389?narHash=sha256-/YdfibIrnqXAL8p5kqCU345mzpHoOtuVIkMiI2pF4Dc%3D' (2025-10-16)
• Updated input 'released-nixpkgs-unstable':
    'github:NixOS/nixpkgs/cf3f5c4def3c7b5f1fc012b3d839575dbe552d43?narHash=sha256-TK9Kr0BYBQ/1P5kAsnNQhmWWKgmZXwUQr4ZMjCzWf2c%3D' (2025-10-12)
  → 'github:NixOS/nixpkgs/544961dfcce86422ba200ed9a0b00dd4b1486ec5?narHash=sha256-EVAqOteLBFmd7pKkb0%2BFIUyzTF61VKi7YmvP1tw4nEw%3D' (2025-10-15)
```

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