[docs] links dead

[ptoche]

Many of the links here are dead: they end in @ref. For instance, the very first one, linking from value is:

https://github.com/JuliaML/LossFunctions.jl/blob/master/docs/src/user/@ref

[Evizero]

These are the source files of the documentation. They are primarily for authoring said docs.
Its best viewed using github pages. e.g. this is the corresponding page of your link: https://juliaml.github.io/LossFunctions.jl/stable/user/aggregate/

[ptoche]

Thanks. 👍

Blame my search engine!