Broken links in File System Access

[dontcallmedom-bot]

While crawling File System Access, the following links to other specifications were detected as pointing to non-existing anchors:

• https://html.spec.whatwg.org/multipage/links.html#as-a-download

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}

[tomayac]

This should likely point at https://html.spec.whatwg.org/multipage/links.html#attr-hyperlink-download.