flake.lock: Update

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/47478a4a003e745402acf63be7f9a092d51b83d7' (2023-02-09)
  → 'github:hercules-ci/flake-parts/7f53fdb7bdc5bb237da7fefef12d099e4fd611ca' (2023-09-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:NixOS/nixpkgs/e1e1b192c1a5aab2960bf0a0bd53a2e8124fa18e?dir=lib' (2023-01-31)
  → 'github:NixOS/nixpkgs/3e52e76b70d5508f3cec70b882a29199f4d1ee85?dir=lib' (2023-08-31)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/ac1f5b72a9e95873d1de0233fddcb56f99884b37' (2023-02-16)
  → 'github:NixOS/nixpkgs/0bffda19b8af722f8069d09d8b6a24594c80b352' (2023-09-06)