Blue source button disappeared for part of the documentation

[biona001]

This is a repost of this discourse questions.

Basically, parts of the documentation no longer have the blue source button that takes you directly to the source code for that function. For example, the triple argument dot(x, A, y)
https://docs.julialang.org/en/v1/stdlib/LinearAlgebra/#LinearAlgebra.dot-Tuple%7BAny,%20Any,%20Any%7D

But parts of the docs still do: e.g. occursin https://docs.julialang.org/en/v1/base/strings/#Base.occursin

[fredrikekre]

#47553