🐛 Fixed how Bookmark, Video and Audio cards look in RSS readers

[daviddarnes]

Fixes Bookmark, Video and Audio cards when viewed within an RSS reader, by adjusting what markup is rendered in the RSS feed.

Addresses issues shared in the following forum topics:

• https://forum.ghost.org/t/bookmarks-feature-and-rss-issues/13479
• https://forum.ghost.org/t/bookmarks-render-horribly-in-rss-feed-reader/47277
• https://forum.ghost.org/t/improvements-to-the-bookmark-video-and-audio-card/31046

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• [x] There's a clear use-case for this code change
• [x] Commit message has a short title & references relevant issues
• [x] The build will pass (run yarn test:all and yarn lint)

[daviddarnes]

Any love for this small PR? 🥺 (cc @kevinansfield)

[daviddarnes]

@sam-lord hey! Do you know if I’m missing something on this PR? Wondering why it’s not gotten attention. Thanks!

[mh4ckt3mh4ckt1c4s]

Please merge this PR. Broken RSS in a CMS is a big setback for a lot of users.

[kevinansfield]

@daviddarnes @mh4ckt3mh4ckt1c4s just found this in the backlog, changes look good but if you're able to add tests for this that verify the input/output markup then the PR will be mergeable 🙂