The website links to raw versions of static test metadata files in the repository, but those may be removed/moved/changed (i.e. theupdateframework/python-tuf#1806).

We should at least update these to blob references (and to the new repository name), so they aren't affected by changes to python-tuf.

It might be even better to include sample metadata file contents directly in the web page, perhaps behind a toggle which defaults to collapsed.