Bug#1000112: kjs: depends on obsolete pcre3 library

[Bastian Germann]

okular and khelpcenter make kjs a key package via khtml.
While it is optional in okular, khelpcenter requires khtml.
This is changing with the 24.08.x versions, which will be part of Plasma 6.
When khelpcenter upgrades to a khtml-free version, this should be followed-up.