remotebox: 2.4 -> 2.5

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/lqc90dpw05j8jvi8n0klma3cipg70h6l-remotebox-2.5/bin/remotebox -h’ got 0 exit code
- found 2.5 with grep in /nix/store/lqc90dpw05j8jvi8n0klma3cipg70h6l-remotebox-2.5
- directory tree listing: https://gist.github.com/52fb098e7f7315de708c331b65eadfb4