`index.tag "link"` doesn't have an `itags` field anymore

I'm running 2.9.0 and noticed that the link index no longer includes an itags field.

Since this change isn't mentioned in the CHANGELOG, I'm not sure whether it was an intentional design decision or an unintended regression.

If this behavior is expected, I can update my Lua scripts. But, if it's a bug, I'd rather wait for a fix before making any changes.

Thanks!

This is likely a regression that was a result of the introduction of the relation tag (which is a more generalized version of link). I'll look into it.