Attachment link text doesn't show the URL by default
The docs state that "Antora will display the URL of the attachment as the link text in the published page" (see https://docs.antora.org/antora/3.0/page/attachments/#link-text).
However, Antora actually displays "attachment$file_name.ext" as link text. Regarding the example on the docs page, it displays:
Download attachment$practice-project.zip to try it out!
instead of:
Download https://docs.example.com/component/version/module/_attachments/practice-project.zip to try it out!