Can't preview markdown file as they get text/turle type instead of text/plain

I believe the issue is upstream but still penny related so I'm just linking it here: https://github.com/inrupt/solid-client-js/issues/2336

content of the issue 2336

Bug description

On the community solid server recipe using Penny UI , text file uploaded as .md .markdown or CSS's by default README.$markdown can't get priviewed by penny. In the debugger I can see they have the text/turtle content type, instead of text/plain ( which I believe is the correct type). To Reproduce

1. clone and run CSS penny recipe
2. Create a new account and a pod
3. Login
4. on a shell echo bar > foo.md
5. upload foo.md to your pod using penny
6. on penny, open foo.md

Expected result

Penny should preview the file ( "bar" ) as if it was a plain text file ( check the result if you use foo.txt instead of foo.md in step 4 )

Actual result

Penny shows This resource is empty.