Not sure wheter .RelPermalink or .Permalink should be used and not
really tested, as I don't know where this is used on the website.

src:
https://discourse.gohugo.io/t/why-does-page-url-deprecated-work-while-relpermalink-throws-an-error/35694
https://discourse.gohugo.io/t/why-does-page-url-deprecated-work-while-relpermalink-throws-an-error/35694