flake.lock: Update

Flake lock file updates:

• Updated input 'bellroy-nix-foss':
    'github:bellroy/bellroy-nix-foss/da73621c62c98e375270f8f8a98295a517aa5685' (2024-06-25)
  → 'github:bellroy/bellroy-nix-foss/b6c032e0c9aeb1886538d9db10809bc441dd2bac' (2024-06-25)
• Updated input 'bellroy-nix-foss/flake-compat':
    'github:edolstra/flake-compat/35bb57c0c8d8b62bbfd284272c928ceb64ddbde9' (2023-01-17)
  → 'github:edolstra/flake-compat/0f9255e01c2351cc7d116c072cb317785dd33b33' (2023-10-04)
• Updated input 'bellroy-nix-foss/flake-utils':
    'github:numtide/flake-utils/dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7' (2023-06-25)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/eef6384e98b48f0c12f8e74a387f4427959f1bdf' (2023-12-11)
  → 'github:nixos/nixpkgs/4c547b66635455ad061d4beecaf1805810dc0428' (2024-06-24)