Hello Lukas,

the canonical way to rewrite this link would be using the htaccess. This is well explained in the pdf documentation.

As an alternative if you have a Joomla menu pointing to the HTML sitemap, you can specify the ID of the menu in the JSitemap configuration to use the menu alias for all links, the parameter is under ' Advanced setting' -> 'Menu ID for SEF sitemap links'
In this way links will be rewritten replacing the 'component/jmap' with a Joomla alias, for example http://localhost:34080/sitemap/sitemap/xml

Other approaches that i can think would be maybe using external extension such as sh404sef to do redirects, but i don't think it's the right way to do this.