Grav is not able to embed links to files in sub folders in raw html

I am in a page directory and want to embed a link inside the .md file.
I have to use raw html inside the markdown. Now I want to add a simple link to a file inside the directory.


now I add the link like this:
however the link appears in my browser like this: instead of

So I need a way to add the relative path from the root to the file to the link inside the raw html?
Any idea how to do this?