D6760: Update kooka documentation to kf5

[Burkhard Lück]

lueck created this revision.

REVISION SUMMARY
  proofread + update

TEST PLAN
  checkXML5

REPOSITORY
  R660 Kooka

REVISION DETAIL
  https://phabricator.kde.org/D6760

AFFECTED FILES
  doc/index.docbook

To: lueck, #documentation