docs: fix scaladoc links, take 2

Signed-off-by: 35V LG84 <35vlg84-x4e6b92@e257.fi>
2 jobs for master in 8 minutes and 43 seconds
Status Job ID Name Coverage
  Test
passed #242446031
test·jdk11

00:07:06

passed #242446032
test·jdk8

00:08:43

99.8%