Hyperlinks in R API reference are broken

[MalteKurz]

If one selects a subclass (like DoubleMLPLR) and expands the inherited methods (from DoubleML) the hyperlinks don't work.

See screenshots

It links to https://docs.doubleml.org/r/DoubleML/html/DoubleML.html#method-confint. It is reachable under https://docs.doubleml.org/r/stable/reference/DoubleML.html#method-confint.
--> Could be related to the "stable" subfolder but maybe it's also a specification in pkgdown which is not yet set appropriately.

[MalteKurz]

Seems to be a known issue r-lib/pkgdown#1173