chore: run nix flake update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/9126214d0a59633752a136528f5f3b9aa8565b7d?narHash=sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm%2BGpZNw%3D' (2024-04-01)
  → 'github:hercules-ci/flake-parts/8471fe90ad337a8074e957b69ca4d0089218391d?narHash=sha256-XOQkdLafnb/p9ij77byFQjDf5m5QYl9b2REiVClC%2Bx4%3D' (2024-08-01)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/7bb2ccd8cdc44c91edba16c48d2c8f331fb3d856?narHash=sha256-Drmja/f5MRHZCskS6mvzFqxEaZMeciScCTFxWVLqWEY%3D' (2024-04-25)
  → 'github:NixOS/nixpkgs/c374d94f1536013ca8e92341b540eba4c22f9c62?narHash=sha256-Z/ELQhrSd7bMzTO8r7NZgi9g5emh%2BaRKoCdaAv5fiO0%3D' (2024-08-21)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/c6aaf729f34a36c445618580a9f95a48f5e4e03f?narHash=sha256-Qv4RBm4LKuO4fNOfx9wl40W2rBbv5u5m%2BwhxRYUMiaA%3D' (2024-04-25)
  → 'github:numtide/treefmt-nix/070f834771efa715f3e74cd8ab93ecc96fabc951?narHash=sha256-kKJtaiU5Ou%2Be/0Qs7SICXF22DLx4V/WhG1P6%2Bk4yeOE%3D' (2024-08-22)