Icon alias: `arrow-up-right-from-square` should show up in a search for "link"

[tryoxiss]

I was looking for an external link icon and normally prefer the version where the arrow head makes up part of the box and was quite supprised to not find it. Later I found it. I didn't think to go looking for a diffrent name as it feels like a pretty common alias for something like that. I don't know if an alias system exists, and it really isn't needed. Just tagging it/adding categories like "link" so it would show up would be great since I don't think this is an uncommon case.