flake.lock: Update

Flake lock file updates:

• Updated input 'advisory-db':
    'github:rustsec/advisory-db/369d98c1b95b7b56d0859605916d7b81a7d1f1c4' (2024-03-15)
  → 'github:rustsec/advisory-db/0bc9a77248be5cb5f2b51fe6aba8ba451d74c6bb' (2024-04-03)
• Updated input 'crane':
    'github:ipetkov/crane/270c7d60d37b769a31bb04d61bc73cc2da1b3f6f' (2024-03-22)
  → 'github:ipetkov/crane/1e44708c0b34380085ba0cbabc230b8adbde1b3a' (2024-04-05)
• Updated input 'fenix':
    'github:nix-community/fenix/85f4139f3c092cf4afd9f9906d7ed218ef262c97' (2024-03-22)
  → 'github:nix-community/fenix/99c6241db5ca5363c05c8f4acbdf3a4e8fc42844' (2024-04-06)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/20bc93ca7b2158ebc99b8cef987a2173a81cde35' (2024-03-23)
  → 'github:NixOS/nixpkgs/9e7f26f82acb057498335362905fde6fea4ca50a' (2024-04-06)