flake.lock: Update (#43)

Flake lock file updates:

• Updated input 'advisory-db':
    'github:rustsec/advisory-db/0bc9a77248be5cb5f2b51fe6aba8ba451d74c6bb' (2024-04-03)
  → 'github:rustsec/advisory-db/0631800c0a23c1e543842a70ccb698d0690f8cc3' (2024-04-13)
• Updated input 'crane':
    'github:ipetkov/crane/1e44708c0b34380085ba0cbabc230b8adbde1b3a' (2024-04-05)
  → 'github:ipetkov/crane/220387ac8e99cbee0ca4c95b621c4bc782b6a235' (2024-04-09)
• Updated input 'fenix':
    'github:nix-community/fenix/99c6241db5ca5363c05c8f4acbdf3a4e8fc42844' (2024-04-06)
  → 'github:nix-community/fenix/c739f83545e625227f4d0af7fe2a71e69931fa4c' (2024-04-12)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/8e581ac348e223488622f4d3003cb2bd412bf27e' (2024-04-03)
  → 'github:rust-lang/rust-analyzer/657b33b0cb9bd49085202e91ad5b4676532c9140' (2024-04-11)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/9e7f26f82acb057498335362905fde6fea4ca50a' (2024-04-06)
  → 'github:nixos/nixpkgs/a0c9e3aee1000ac2bfb0e5b98c94c946a5d180a9' (2024-04-12)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>