flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/8eb28adfa3dc4de28e792e3bf49fcf9007ca8ac9?narHash=sha256-NOrUtIhTkIIumj1E/Rsv1J37Yi3xGStISEo8tZm3KW4%3D' (2025-09-05)
  → 'github:nixos/nixpkgs/c23193b943c6c689d70ee98ce3128239ed9e32d1?narHash=sha256-hLEO2TPj55KcUFUU1vgtHE9UEIOjRcH/4QbmfHNF820%3D' (2025-09-13)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/ab82ab08d6bf74085bd328de2a8722c12d97bd9d?narHash=sha256-E9spYi9lxm2f1zWQLQ7xQt8Xs2nWgr1T4QM7ZjLFphM%3D' (2025-09-07)
  → 'github:cachix/pre-commit-hooks.nix/b084b2c2b6bc23e83bbfe583b03664eb0b18c411?narHash=sha256-tJ7A8mID3ct69n9WCvZ3PzIIl3rXTdptn/lZmqSS95U%3D' (2025-09-11)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/cfd63776bde44438ff2936f0c9194c79dd407a5f?narHash=sha256-yuFSw6fpfjPtVMmym51ozHYpJQ7SzVOTkk7tUv2JA0U%3D' (2025-09-08)
  → 'github:oxalica/rust-overlay/3232f7f8bd07849fc6f4ae77fe695e0abb2eba2c?narHash=sha256-Jxl4OZRVsXs8JxEHUVQn3oPu6zcqFyGGKaFrlNgbzp0%3D' (2025-09-13)

Author: github-actions[bot]