stdlib documentation "Edit on GitHub" link broken

[cmichelenstrofer]

The "Edit on GitHub" button in several (all?) of the documentation for the standard library points to the wrong URL. E.g. for Test.jl it points to

https://github.com/JuliaLang/julia/blob/master/**usr/share/julia/stdlib/v1.8/Test/docs/src/index.md

which doesn't exist, instead of

https://github.com/JuliaLang/julia/blob/master/stdlib/Test/docs/src/index.md

I could not find where this documentation is being built or I would have tried to submit a PR for a fix.

[fredrikekre]

Duplicate of #43307, JuliaDocs/Documenter.jl#1975.