Broken references in Media Session

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This pull request was automatically created by Strudy upon detecting errors in Media Session.

Please check that these errors were correctly detected, and that they have not already been reported in https://github.com/w3c/mediasession.

If everything is OK, you can merge this pull request which will report the issue below to the repo, and update the underlying report file with a link to the said issue.

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Repo: 'https://github.com/w3c/mediasession'
Tracked: N/A
Title: Broken references in Media Session

While crawling Media Session, the following links to other specifications were detected as pointing to non-existing anchors:

• https://html.spec.whatwg.org/multipage/#link

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