Wrong sitemap.xml url in robots.txt in multi language setups

[olach]

I have a website with two languages using the default Kirby setup where the language code is prefixed on all url:s.

www.example.com/sv/
www.example.com/en/

This causes problems with the generated sitemap url in /robots.txt.

In the /robots.txt, the sitemap url is generated as follows:

Sitemap: https://www.example.com/sv/sitemap.xml

This url generates a 404. The correct url should be:

Sitemap: https://www.example.com/sitemap.xml

For my site, I have solved this temporarily by setting the sitemap url manually in config. But it would be great if your otherwise fantastic plugin could handle this natively.