svgbob: fix build
svgbob: fix build

See https://hydra.nixos.org/build/102480738

Bumping to latest version (which is 0.4.2 according to Cargo.lock) fixes
the build error. As no dependency changes happened, cargoSha256 doesn't
need to be updated.

ZHF #68361

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs