inboxer: 1.0.3 -> 1.0.4 (#38226)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/inboxer/versions.

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 1.0.4 with grep in /nix/store/p1nbzvgxwp6fczn96a1wdblpvm5h42m8-inboxer-1.0.4
- directory tree listing: https://gist.github.com/e6ce6651760c07005f1d533c2cafc824