Handle 404-Error with "back to documentation" link from provenance site
The "Provenance of this page" link includes a "back to documentation" link that points to https://nfdi4ing.pages.rwth-aachen.de/metadata4ing/metadata4ing/index-en.html instead of https://nfdi4ing.pages.rwth-aachen.de/metadata4ing/metadata4ing/index.html and therefore get's an 404 Error.