scribusUnstable: build with libsForQt5

[erictapen]

See #104474

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[drewrisinger]

• Diff LGTM
• Commits LGTM
• Builds via nix-review on x86-64-linux:

https://github.com/NixOS/nixpkgs/pull/106781
1 package built:
scribusUnstable

Didn't really test beyond this b/c I'm on a headless machine, hence lack of approve/request.

[Kiwi]

I built it on aarch64-linux (not yet tested, I can get on a pi later but haven't yet) and x86_64-linux (launched, LGTM)

unrelated; I attempted x86_64-darwin for kicks since it is currently unsupported and fails but I think it's possible to so I'll try and get working eventually now that I have a darwin builder and am trying to get everything I can supported >.>

[erictapen]

@Kiwi nice, good luck with supporting darwin!

I'll merge this then.