flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/4524271976b625a4a605beefd893f270620fd751?narHash=sha256-%2BuWLQZccFHwqpGqr2Yt5VsW/PbeJVTn9Dk6SHWhNRPw%3D' (2025-09-01)
  → 'github:hercules-ci/flake-parts/427bf4bd9435fdf21321c8cc628c24efc14c0f7a?narHash=sha256-4dtXQk/NMePegK/nWp5NSeuZKLATItOq61lpEvmXqGw%3D' (2026-08-01)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/8eb28adfa3dc4de28e792e3bf49fcf9007ca8ac9?narHash=sha256-NOrUtIhTkIIumj1E/Rsv1J37Yi3xGStISEo8tZm3KW4%3D' (2025-09-05)
  → 'github:NixOS/nixpkgs/b7c2ada94fe99c15b0dbcf4d11fd7850b957a436?narHash=sha256-IItrdb7Puk05RqOBWZYFC5X6Wl1sJmCfh5MWVHw5iMM%3D' (2026-08-05)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/5eda4ee8121f97b218f7cc73f5172098d458f1d1?narHash=sha256-ySNJ008muQAds2JemiyrWYbwbG%2BV7S5wg3ZVKGHSFu8%3D' (2025-09-24)
  → 'github:numtide/treefmt-nix/ae7910970dddc408fe6ab1c8e4b277bb21d72dc0?narHash=sha256-NLSyTCW4K4ofhNBllt3omPasm6QpralXH1DBZOc91Dw%3D' (2026-08-05)

Author: github-actions[bot]