Franz Pletz

[Contribution](README.md#contributing) checklist (recommended but not always applicable/required): - [x] There's an _[automated test](tests/default.nix)_ for this change - [ ] Commit messages or code include _references to related issues or PRs_...

To support netbooting NixOS from https://netboot.xyz/, we need a stable URL for the ISO images per channel. Adding a redirect to the htaccess file https://github.com/NixOS/nixos-channel-scripts/blob/c3a9ba32eed893679586be0595dba71fe602518d/mirror-nixos-branch.pl#L213-L215 should be should be enough.

## Description of changes Maybe fixes darwin build. No access to a darwin machine. ## Things done - Built on platform(s) - [x] x86_64-linux - [ ] aarch64-linux - [...