Follow-up from "Resolve "Update page metadata to enable previews for work items""

The following discussion from !157049 (merged) should be addressed:

• @jachapman started a discussion: (+1 comment)

  Not sure about the use of _("Epics") here as this page could show any namespace-level work item.

  We can use the Work Item Type name instead, but I couldn't find a way to get the localised versions of these anywhere.