Bug: inline markup in link descriptions not being recognised

[GuiltyDolphin]

For example, with the following:

[[https://duckduckgo.com][Duck *Duck* _Duck_ /Duck/ ~Go~ =Go= +Go+ Go!]]

We'd expect some of the markup to be recognised, but it is not. Specifically, Org in Emacs seems to recognise the ~Go~, =Go=, and +Go+ (not sure why the others aren't recognised).