cobang: minor fix to patch replacing poetry with poetry-core

[tjni]

Description of changes

As I was working on migrating Python builds to use build, it flagged that the patch being used to replace poetry with poetry-core was missing one replacement. I've fixed that here.

Note that cobang is still broken on master after the pillow update. How it should be fixed is updated to v0.10.1, after which the current poetry patch can be removed, and then also patched to work with pillow v10. However, I would like to merge this small fix in the meantime because it changes the error signature to what is really wrong, which is that support for the new major version of pillow needs to be added.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.