Fix freesound download

[rebane2001]

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Description of your pull request and other information

Freesound.org downloads are broken due to how the preview URLs sometimes appear in the HTML: <meta property="og:audio" content="https://freesound.orghttps://cdn.freesound.org/..." />.

This PR will fix the URL if necessary by removing the https://freesound.org part of the url when it seems like there is another one after it.

Fixes #6146

Template

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