Fix links
Fix links

... to longer paths, which are still used in `master`.

SpineEventEngine/SpineEventEngine.github.io,SpineEventEngine/SpineEventEngine.github.io,SpineEventEngine/SpineEventEngine.github.io,SpineEventEngine/SpineEventEngine.github.io,SpineEventEngine/SpineEventEngine.github.io,SpineEventEngine/SpineEventEngine.github.io